Question

What is the measure of angle 1?
Write the answer without the degree.

Answer 1

70

Explanation:

Everything needs to add up to 180. So you have 90 and 20 you will add them and you’ll get 110. Since you want to find the missing measurement you will subtract 180-110 and you’ll get 70. The missing angle is 70. To check: 90+20+70=180

Answer 2

Answer: 70

90+20=110

180-110=70

I hope this is good enough: