Question

Za and Z6
are
complementary angles. Za measures 78°.
What is the measure of Zb?

Answer 1

`\boxed{\angle b = 12 \degree}`

Given:

`\angle a \: and \: \angle b \: are \: complementary \: angles\\ \\ \angle a = 78 \degree`

Explanation:

Two Angles are Complementary when they add up to 90° (a Right Angle).

`= > \angle a + \angle b = 90 \degree \\ \\ = > 78 \degree + \angle b = 90\degree \\ \\ = > \angle b = 90 \degree - 78 \degree \\ \\ = > \angle b = 12 \degree`