Answer:

The first angle measures 30° while the second angle measures 60°.

Step-by-step explanation:

Complementary angles are two consecutive angles whose sum is 90°.

Solve for the first angle.

x + 2x = 90

3x = 90

3x ÷ 4 = 90 ÷ 3

x = 30

The first angle measures 30°.

Solve for the second angle.

2x = 2 × 30 = 60

The second angle measures 60°.

Make sure that the angles are complementary.

30° + 60° = 90°

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