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Geometry

Cindy J. Boyd, Jerry Cummins, Carol E. Malloy

Chapter 12

Extending Surface Area - all with Video Answers

Educators


Section 1

Representations of Three-Dimensional Figures

02:22

Problem 1

Sketch a rectangular prism 4 units high, 2 units long, and 3 units wide using isometric dot paper.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
03:28

Problem 2

Draw a corner view of the figure given its orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
02:11

Problem 3

A deli slicer is used to cut cylindrical blocks of cheese for sandwiches. Suppose a customer wants slices of cheese that are round and slices that are rectangular. How can the cheese be placed on the slicer to get each shape?

Anna Jones
Anna Jones
Numerade Educator
01:33

Problem 4

Sketch each solid using isometric dot paper.
rectangular prism 3 units high, 4 units long, and 5 units wide

Anna Jones
Anna Jones
Numerade Educator
02:20

Problem 5

Sketch each solid using isometric dot paper.
cube 5 units on each edge

Anna Jones
Anna Jones
Numerade Educator
01:58

Problem 6

Sketch each solid using isometric dot paper.
cube 4 units on each edge

Anna Jones
Anna Jones
Numerade Educator
02:32

Problem 7

Sketch each solid using isometric dot paper.
rectangular prism 6 units high, 6 units long, and 3 units wide

Anna Jones
Anna Jones
Numerade Educator
01:58

Problem 8

Sketch each solid using isometric dot paper.
triangular prism 4 units high, with bases that are right triangles with legs 5 units and 4 units long

Anna Jones
Anna Jones
Numerade Educator
02:58

Problem 9

Sketch each solid using isometric dot paper.
triangular prism 2 units high, with bases that are right triangles with legs 3 units and 7 units long

Anna Jones
Anna Jones
Numerade Educator
04:17

Problem 10

Draw a corner view of a figure given each orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
06:45

Problem 11

Draw a corner view of a figure given each orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
07:06

Problem 12

Draw a corner view of a figure given each orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
02:47

Problem 13

Draw a corner view of a figure given each orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:33

Problem 14

Determine the shape resulting from each cross section of the cone.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:10

Problem 15

Determine the shape resulting from each cross section of the cone.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
00:51

Problem 16

Determine the shape resulting from each cross section of the cone.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
00:47

Problem 17

Determine the shape resulting from each cross section of the rectangular prism.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
02:39

Problem 18

Determine the shape resulting from each cross section of the rectangular prism.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
00:44

Problem 19

Determine the shape resulting from each cross section of the rectangular prism.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:53

Problem 20

Draw a diagram and describe how a plane can slice a tetrahedron to form the following shapes.
equilateral triangle

Anna Jones
Anna Jones
Numerade Educator
02:03

Problem 21

Draw a diagram and describe how a plane can slice a tetrahedron to form the following shapes.
isosceles triangle

Anna Jones
Anna Jones
Numerade Educator
03:02

Problem 22

Draw a diagram and describe how a plane can slice a tetrahedron to form the following shapes.
quadrilateral

Anna Jones
Anna Jones
Numerade Educator
01:28

Problem 23

A well-cut diamond enhances the natural beauty of the stone. These cuts are called facets. Describe the shapes seen in an uncut diamond.

Noraney Ocampo
Noraney Ocampo
Numerade Educator
01:50

Problem 24

Many minerals have a crystalline structure. The forms of three minerals are shown below. Describe the cross sections from a horizontal and vertical slice of each crystal.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
02:03

Problem 25

Many minerals have a crystalline structure. The forms of three minerals are shown below. Describe the cross sections from a horizontal and vertical slice of each crystal.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
02:55

Problem 26

Many minerals have a crystalline structure. The forms of three minerals are shown below. Describe the cross sections from a horizontal and vertical slice of each crystal.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:52

Problem 27

Many minerals have a crystalline structure. The forms of three minerals are shown below. Describe the cross sections from a horizontal and vertical slice of each crystal.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
02:14

Problem 28

Given the net of a solid, use isometric dot paper to draw the solid.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:41

Problem 29

Given the net of a solid, use isometric dot paper to draw the solid.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:31

Problem 30

Given the corner view of a figure, sketch the orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:31

Problem 31

Given the corner view of a figure, sketch the orthographic drawing.

Anna Jones
Anna Jones
Numerade Educator
01:25

Problem 32

Given the corner view of a figure, sketch the orthographic drawing.
(FIGURE CAN'T COPY)

Anna Jones
Anna Jones
Numerade Educator
01:12

Problem 33

In a two-dimensional plane, figures are symmetric with respect to a line or a point. In three-dimensional space, solids are symmetric with respect to a plane. This is called reflection symmetry. A square pyramid has four planes of symmetry. Two pass through the altitude and one pair of opposite vertices of the base. Two pass through the altitude and the midpoint of one pair of opposite edges of the base.
For each solid, determine the number of planes of symmetry and describe them.
tetrahedron

Sheryl Stone
Sheryl Stone
Numerade Educator
01:29

Problem 34

In a two-dimensional plane, figures are symmetric with respect to a line or a point. In three-dimensional space, solids are symmetric with respect to a plane. This is called reflection symmetry. A square pyramid has four planes of symmetry. Two pass through the altitude and one pair of opposite vertices of the base. Two pass through the altitude and the midpoint of one pair of opposite edges of the base.
For each solid, determine the number of planes of symmetry and describe them.
cylinder

Sheryl Stone
Sheryl Stone
Numerade Educator
01:12

Problem 35

In a two-dimensional plane, figures are symmetric with respect to a line or a point. In three-dimensional space, solids are symmetric with respect to a plane. This is called reflection symmetry. A square pyramid has four planes of symmetry. Two pass through the altitude and one pair of opposite vertices of the base. Two pass through the altitude and the midpoint of one pair of opposite edges of the base.
For each solid, determine the number of planes of symmetry and describe them.
sphere

Sheryl Stone
Sheryl Stone
Numerade Educator
05:38

Problem 36

Three-dimensional solids exhibit rotational symmetry in the same way as two-dimensional figures. Identify the order and magnitude of the rotational symmetry of each solid with respect to its base.
regular pentagonal prism

James Schroeder
James Schroeder
Numerade Educator
01:12

Problem 37

Three-dimensional solids exhibit rotational symmetry in the same way as two-dimensional figures. Identify the order and magnitude of the rotational symmetry of each solid with respect to its base.
tetrahedron

Sheryl Stone
Sheryl Stone
Numerade Educator
01:26

Problem 38

The cross section of a solid is an octagon. Name the solids that have octagonal cross sections.

Sheryl Stone
Sheryl Stone
Numerade Educator
02:49

Problem 39

REASONING Of the two-dimensional representations that you have studied, which would you choose to represent plans for a new skyscraper? Explain.

Sheryl Stone
Sheryl Stone
Numerade Educator
00:19

Problem 40

Select three different three-dimensional figures. Draw a net for each on cardboard. Cut out the cardboard and use tape to construct each model.

Erika Bustos
Erika Bustos
Numerade Educator
03:33

Problem 41

Identify the term that does not belong with the other three. Explain your reasoning.
isometric drawing net $\quad$ construction orthographic drawing

Anna Jones
Anna Jones
Numerade Educator
01:09

Problem 42

Analyze the relationship between a three-dimensional solid and a two-dimensional representation. Include a description of orthographic drawings and isometric drawings.

Brandon Fox
Brandon Fox
Numerade Educator
02:10

Problem 43

Which of the following cannot be formed by the intersection of a cube and a plane?
$\mathbf{A}$ a triangle
$\mathbf{B}$ a rectangle
$\mathbf{C}$ a point
$\mathbf{D}$ a circle

Anna Jones
Anna Jones
Numerade Educator
01:40

Problem 44

How many centimeters are in 35 millimeters?
F. 0.35 centimeters
G. 3.5 centimeters
H. 350 centimeters
J. $35,000$ centimeters

Anna Jones
Anna Jones
Numerade Educator
00:54

Problem 45

The results of a restaurant survey are shown in the circle graph with the measurement of each central angle. Each customer was asked to choose a favorite entrée. If a customer is chosen at random, find the probability of each response.
(PIE GRAPH CAN'T COPY)
steak

Anna Jones
Anna Jones
Numerade Educator
01:04

Problem 46

The results of a restaurant survey are shown in the circle graph with the measurement of each central angle. Each customer was asked to choose a favorite entrée. If a customer is chosen at random, find the probability of each response.
(PIE GRAPH CAN'T COPY)
not seafood

Anna Jones
Anna Jones
Numerade Educator
01:22

Problem 47

The results of a restaurant survey are shown in the circle graph with the measurement of each central angle. Each customer was asked to choose a favorite entrée. If a customer is chosen at random, find the probability of each response.
(PIE GRAPH CAN'T COPY)
either pasta or chicken

Anna Jones
Anna Jones
Numerade Educator
01:21

Problem 48

The results of a restaurant survey are shown in the circle graph with the measurement of each central angle. Each customer was asked to choose a favorite entrée. If a customer is chosen at random, find the probability of each response.
(PIE GRAPH CAN'T COPY)
neither pasta nor steak

Anna Jones
Anna Jones
Numerade Educator
01:46

Problem 49

The coordinates of the vertices of a composite figure are given. Find the area of each figure.
$$A(1,4), B(4,1), C(1,-2), D(-3,1)$$

Christine Tabor
Christine Tabor
Numerade Educator
04:10

Problem 50

The coordinates of the vertices of a composite figure are given. Find the area of each figure.
$$F(-2,-4), G(-2,-1), H(1,1), J(4,1), K(6,-4)$$

Christine Tabor
Christine Tabor
Numerade Educator
02:25

Problem 51

Solve each $\triangle A B C$ described below. Round to the nearest tenth if necessary.
$$m \angle A=54, b=6.3, c=7.1$$

Gregory Higby
Gregory Higby
Numerade Educator
02:25

Problem 52

Solve each $\triangle A B C$ described below. Round to the nearest tenth if necessary.
$$m \angle B=47, m \angle C=69, a=15$$

Gregory Higby
Gregory Higby
Numerade Educator
02:24

Problem 53

Determine the relationship between the measures of the given angles.
(DIAGRAM CAN'T COPY)
$$\angle A D B, \angle A B D$$

Sheryl Stone
Sheryl Stone
Numerade Educator
01:57

Problem 54

Determine the relationship between the measures of the given angles.
(DIAGRAM CAN'T COPY)
$$\angle A B D, \angle B A D$$

Sheryl Stone
Sheryl Stone
Numerade Educator
01:34

Problem 55

Determine the relationship between the measures of the given angles.
(DIAGRAM CAN'T COPY)
$$\angle B C D, \angle C D B$$

Sheryl Stone
Sheryl Stone
Numerade Educator
01:24

Problem 56

Determine the relationship between the measures of the given angles.
(DIAGRAM CAN'T COPY)
$$\angle C B D, \angle B C D$$

Sheryl Stone
Sheryl Stone
Numerade Educator
01:22

Problem 57

Find the area of each figure.
(FIGURE CAN'T COPY)

Katelyn Chen
Katelyn Chen
Numerade Educator
01:22

Problem 58

Find the area of each figure.
(FIGURE CAN'T COPY)

Katelyn Chen
Katelyn Chen
Numerade Educator
01:22

Problem 59

Find the area of each figure.
(FIGURE CAN'T COPY)

Katelyn Chen
Katelyn Chen
Numerade Educator
01:22

Problem 60

Find the area of each figure.
(FIGURE CAN'T COPY)

Katelyn Chen
Katelyn Chen
Numerade Educator