Answer:
The first one is m A + 30 + 90 = 180
Second is 60
Step-by-step explanation:
A triangle’s added up angles ALWAYS equals 180.
The formula here is to subtract the two known angles from 180 and the answer leaves you with the unknown angle.
180 - 90 - 30 = A
So,
180 - 90 - 30 = 60
You can check by adding all the angles and it adding up to 180
90 + 30 + 60 = 180
