Geometry for Enjoyment and Challenge

Richard Rhoad, George Milauskas, Robert Whipple

Chapter 3 Congruent Triangles - all with Video Answers

Educators

Section 1

What Are Congruent Figures?

01:34

Problem 1

Indicate which triangles are congruent. Be sure to have the correspondence of letters correct. (FIGURE CANNOT COPY)
$$\begin{array}{l}\triangle \mathrm{ERC} \cong ? \\\text { Why is } \overline{\mathrm{RC}} \cong \overline{\mathrm{RC}} ?\end{array}$$

Amy Monaghan

Numerade Educator

02:14

Problem 2

Indicate which triangles are congruent. Be sure to have the correspondence of letters correct. (FIGURE CANNOT COPY)
E is the midpt. of $\overline{\mathrm{TP}}$. $\triangle \mathrm{SPE} \cong ?$

Jennifer Stoner

Numerade Educator

02:52

Problem 3

Indicate which triangles are congruent. Be sure to have the correspondence of letters correct. (FIGURE CANNOT COPY)
$$\begin{aligned}&\triangle \mathrm{BOW} \cong ?\\&\text { Why is } \angle 1 \cong \angle 2 ?
\end{aligned}$$

Jennifer Stoner

Numerade Educator

04:38

Problem 4

a Copy $\triangle \mathrm{PQR}$. Draw its reflection over the $\mathrm{x}$ -axis and give the coordinates of the vertices.
b Copy $\triangle \mathrm{PQR}$. Draw its reflection over the y-axis and give the coordinates of the vertices.
c Copy $\triangle \mathrm{PQR}$. Slide it 3 units to the left and give the coordinates of the vertices.

Jennifer Stoner

Numerade Educator

04:54

Problem 5

a Draw the rotation of $\triangle \mathrm{PQR} 180^{\circ}$ clockwise about $\mathrm{O}$. Label its vertices with their coordinates.
b Draw the slide of $\triangle \mathrm{PQR}$ along ray $\overrightarrow{\mathrm{PR}}$ so that $\mathrm{P}$ is at $\mathrm{O},$ and label its vertices with their coordinates.
c Draw the reflection of $\triangle P Q R$ over the $y$ -axis and label its vertices with their coordinates.

Jennifer Stoner

Numerade Educator