# Geometry A Common Core Curriculum

## Educators  ### Problem 1

Compare collinear points and coplanar points. Luca A.

### Problem 2

Which term does not belong with the other three? Explain your reasoning.
$\overline{\mathrm{AB}}$
plane CDE
FG
HI Sachit K.

### Problem 3

In Exercises $3-6,$ use the diagram.

Name four points. Luca A.

### Problem 4

In Exercises $3-6,$ use the diagram.

Name two lines. Sachit K.

### Problem 5

In Exercises $3-6,$ use the diagram.

Name the plane that contains points $A, B,$ and $C$ Luca A.

### Problem 6

In Exercises $3-6,$ use the diagram.

Name the plane that contains points $A, D,$ and $E$ Sachit K.

### Problem 7

In Exercises $7-10,$ use the diagram.

Give two other names for $\overline{\mathrm{WQ}}$ Luca A.

### Problem 8

In Exercises $7-10,$ use the diagram.

Give another name for plane $\mathrm{V}$ Sachit K.

### Problem 9

In Exercises $7-10,$ use the diagram.

Name three points that are collinear. Then name a fourth point that is not collinear with these three points. Luca A.

### Problem 10

In Exercises $7-10,$ use the diagram.

Name a point that is not coplanar with $\mathrm{R}, \mathrm{S},$ and $\mathrm{T}$ . Sachit K.

### Problem 11

In Exercises $11-16,$ use the diagram.

What is another name for $\overline{\mathrm{BD}} ?$ Luca A.

### Problem 12

In Exercises $11-16,$ use the diagram.

What is another name for $\overline{\mathrm{AC}}$ ? Sachit K.

### Problem 13

In Exercises $11-16,$ use the diagram.

What is another name for ray $\mathrm{AE}$ ? Luca A.

### Problem 14

In Exercises $11-16,$ use the diagram.

Name all rays with endpoint E. Sachit K.

### Problem 15

In Exercises $11-16,$ use the diagram.

Name two pairs of opposite rays. Luca A.

### Problem 16

In Exercises $11-16,$ use the diagram.

Name one pair of rays that are not opposite rays. Sachit K.

### Problem 17

In Exercises $17-24,$ sketch the figure described.

plane $\mathrm{P}$ and line $\ell$ intersecting at one point Luca A.

### Problem 18

In Exercises $17-24,$ sketch the figure described.

plane $\mathrm{K}$ and line $\mathrm{m}$ intersecting at all points on line m Sachit K.

### Problem 19

In Exercises $17-24,$ sketch the figure described.

$A B$ and $A C$ Luca A.

### Problem 20

In Exercises $17-24,$ sketch the figure described.

$\mathrm{MN}$ and $\mathrm{NX}$ Sachit K.

### Problem 21

In Exercises $17-24,$ sketch the figure described.

plane M and $\mathrm{NB}$ intersecting at $\mathrm{B}$ Luca A.

### Problem 22

In Exercises $17-24,$ sketch the figure described.

plane M and $\mathrm{NB}$ intersecting at $\mathrm{A}$ Sachit K.

### Problem 23

In Exercises $17-24,$ sketch the figure described.

plane $\mathrm{A}$ and plane $\mathrm{B}$ not intersecting Luca A.

### Problem 24

In Exercises $17-24,$ sketch the figure described.

plane $\mathrm{C}$ and plane $\mathrm{D}$ intersecting at $\mathrm{XY}$ Sachit K.

### Problem 25

In Exercises 25 and 26, describe and correct the error in naming opposite rays in the diagram. Luca A.

### Problem 26

In Exercises 25 and 26, describe and correct the error in naming opposite rays in the diagram.

$\overline{\mathrm{YC}} \mathrm{and}$ $\overline{\mathrm{YE}}$ are opposite rays. Sachit K.

### Problem 27

In Exercises $27-34,$ use the diagram.

Name a point that is collinear with points $\mathrm{E}$ and $\mathrm{H}$ . Luca A.

### Problem 28

In Exercises $27-34,$ use the diagram.

Name a point that is collinear with points $\mathrm{B}$ and $\mathrm{I}$ Sachit K.

### Problem 29

In Exercises $27-34,$ use the diagram.

Name a point that is not collinear with points $\mathrm{E}$
and $\mathrm{H}$ . Luca A.

### Problem 30

In Exercises $27-34,$ use the diagram.

Name a point that is not collinear with points $\mathrm{B}$ and $\mathrm{I}$ . Sachit K.

### Problem 31

In Exercises $27-34,$ use the diagram.

Name a point that is coplanar with points $\mathrm{D}, \mathrm{A},$ and $\mathrm{B}$ . Luca A.

### Problem 32

In Exercises $27-34,$ use the diagram.

Name a point that is coplanar with points $\mathrm{C}, \mathrm{G},$ and $\mathrm{F}$ Sachit K.

### Problem 33

In Exercises $27-34,$ use the diagram.

Name the intersection of plane AEH and plane FBE. Luca A.

### Problem 34

In Exercises $27-34,$ use the diagram.

Name the intersection of plane BGF and plane HDG. Sachit K.

### Problem 35

In Exercises $35-38,$ name the geometric term modeled by the object. Luca A.

### Problem 36

In Exercises $35-38,$ name the geometric term modeled by the object. Sachit K.

### Problem 37

In Exercises $35-38,$ name the geometric term modeled by the object. Luca A.

### Problem 38

In Exercises $35-38,$ name the geometric term modeled by the object. Sachit K.

### Problem 39

In Exercises $39-44,$ use the diagram to name all the points that are not coplanar with the given points.

$\mathrm{N}, \mathrm{K},$ and $\mathrm{L}$ Luca A.

### Problem 40

In Exercises $39-44,$ use the diagram to name all the points that are not coplanar with the given points.

$\mathrm{P}, \mathrm{Q},$ and $\mathrm{N}$ Sachit K.

### Problem 41

In Exercises $39-44,$ use the diagram to name all the points that are not coplanar with the given points.

$P, Q,$ and $R$ Luca A.

### Problem 42

In Exercises $39-44,$ use the diagram to name all the points that are not coplanar with the given points.

$\mathrm{R}, \mathrm{K},$ and $\mathrm{N}$ Sachit K.

### Problem 43

In Exercises $39-44,$ use the diagram to name all the points that are not coplanar with the given points.

$\mathrm{P}, \mathrm{S},$ and $\mathrm{K}$ Luca A.

### Problem 44

In Exercises $39-44,$ use the diagram to name all the points that are not coplanar with the given points.

$\mathrm{Q}, \mathrm{K},$ and $\mathrm{L}$ Sachit K.

### Problem 45

Given two points on a line and a third point not on the line, is it possible to draw a plane that includes the line and the third point? Explain your reasoning. Luca A.

### Problem 46

Is it possible for one point to be in two different planes? Explain your reasoning. Sachit K.

### Problem 47

Explain why a four-legged chair may rock from side to side even if the floor is level. Would a three-legged chair on the same level floor rock from side to side? Why or why not? Luca A.

### Problem 48

You are designing the living room of an apartment. Counting the floor, walls, and ceiling, you want the design to contain at least eight different planes. Draw a diagram of your design. Label each plane in your design. Sachit K.

### Problem 49

Two coplanar intersecting lines will always intersect at one point. What is the greatest number of intersection points that exist if you draw four coplanar lines? Explain. Luca A.

### Problem 50

You and your friend walk in opposite directions, forming opposite rays. You were originally on the corner of Apple Avenue and Cherry Court.
a. Name two possibilities of the road and direction you and your friend may have traveled.
b. Your friend claims he went north on Cherry Court, and you went east on Apple Avenue. Make an argument as to why you know this could not have happened. Sachit K.

### Problem 51

In Exercises $51-54$ graph the inequality on a number line. Tell whether the graph is a segment, a ray or rays, a point, or a line.

$$x \leq 3$$ Luca A.

### Problem 52

In Exercises $51-54$ graph the inequality on a number line. Tell whether the graph is a segment, a ray or rays, a point, or a line.

$$-7 \leq x \leq 4$$ Sachit K.

### Problem 53

In Exercises $51-54$ graph the inequality on a number line. Tell whether the graph is a segment, a ray or rays, a point, or a line.

$$x \geq 5 \text { or } x \leq-2$$ Luca A.

### Problem 54

In Exercises $51-54$ graph the inequality on a number line. Tell whether the graph is a segment, a ray or rays, a point, or a line.

$$\left.\right|_{\mathrm{X}} | \leq 0$$ Sachit K.

### Problem 55

Use the diagram.
a. Name two points that are collinear with $\mathrm{P}$ .
b. Name two planes that contain J.
c. Name all the points that are in more than one plane. Luca A.

### Problem 56

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

A line ______ has endpoints. Sachit K.

### Problem 57

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

A line and a point ________ intersect. Luca A.

### Problem 58

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

A plane and a point ________ intersect. Sachit K.

### Problem 59

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

Two planes ________ determine a line. Luca A.

### Problem 60

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

Two points ________ determine a line. Sachit K.

### Problem 61

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

Any three points _____ determine a plane. Luca A.

### Problem 62

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

Any three points not on the same line ________ determine a plane. Sachit K.

### Problem 63

In Exercises $56-63,$ complete the statement with always, sometimes, or never. Explain your reasoning.

Two lines that are not parallel _________ intersect. Luca A.

### Problem 64

Is it possible for three planes to never intersect? intersect in one line? intersect in one point? Sketch the possible situations. Sachit K.

### Problem 65

Find the absolute value.

$|6 2 |$ Luca A.

### Problem 66

Find the absolute value.

$$|3-9|$$ Sachit K.

### Problem 67

Find the absolute value.

$$|-8-2|$$ Luca A.

### Problem 68

Find the absolute value.

$$|7-11|$$ Sachit K.

### Problem 69

Solve the equation.

$$18 \mathrm{x}=43$$ Luca A.

### Problem 70

Solve the equation.

$$36 \mathrm{x}=20$$ Sachit K.

### Problem 71

Solve the equation.

$$x-15=7$$ Luca A.
$$x-23=19$$ 