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Envision Math 2.0: Grade 7, Volume 2

EM

Envision Math 2.0: Grade 7, Volume 2 View details

Review

Exercise 1 Page 479

Notice that the ray ZX splits a right angle.

Example Pair: ∠ QZX and ∠ XZY

Practice makes perfect

We are given the following figure.

We are asked to name a pair of complementary angles.

Complementary Angles
Complementary angles have a sum of 90^(∘).

First, notice that ∠ QZY is a 90^(∘) angle.

We can see that the ray ZX splits this angle into two angles ∠ QZX and ∠ XZY.

This means that angles m∠ QZX and m∠ XZY add up to 90^(∘), so they are complementary.

Subchapter links

Topic Essential Question p.477

Vocabulary Review p.477

Use Vocabulary in Writing p.477

1 Solve Problems Involving Scale Drawings p.478

2 Draw Geometric Figures p.478

3 Draw Triangles with Given Conditions p.479

4 Solve Problems Using Angle Relationships p.479

5 Solve Problems Involving Circumference of a Circle p.480

6 Solve Problems Involving Area of a Circle p.480

7 Describe Cross Sections p.481

8 Solve Problems Involving Surface Area p.481

9 Solve Problems Involving Volume p.482