CPM Homework Help : CCAA Problem 9-96

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Home > CCAA > Chapter 9 Unit 10 > Lesson CC3: 9.2.3 > Problem 9-96

9-96.

For each diagram below, solve for $x$ . Explain what method you used for each problem.

Hint (a):
The two angles are complementary, meaning they have a sum of $90°$ .

Hint (b):
The two angles are supplementary (have a sum of $180°$ ).
Answer (b):
$x=20°$

Hint (c):
According to the Angle Sum Theorem, the sum of the interior angles of a triangle is $180°$ .

Hint (d):
How did you solve part (c)? Use the same method.
Step 1 (d):
$x + 30 + 90 = 180$
Step 2 (d):
$x + 120 = 180$
Answer (d):
$x=60°$

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