Question

Find the measure of the numbered angle.

m∠4 =

Answer 1

m∠4 =

Explanation:

Answer 2

<4 = 130

Explanation:

The sum of the angles of a triangle is 180

<1 + 40 + 90 = 180

<1 + 130 = 180

<1 = 50

<1 and <4 form a straight line so they add to 180

<1 + <4 = 180

50 + <4 = 180

<4 = 180-50

<4 = 130