Question

Find the measure of angle A

Answer 1

Angle A= 30

Explanation:

A triangle has to equal 180 degrees so the first thing you have to do is subtract 180-70. You get 110 so the other two angles in the triangle have to equal 110.

Now you can solve the expression x+40+x+90=110

First combine like terms 2x+130=110

Then subtract 130 from both sides 2x=-20

Then divide by 2 x=-10

Then solve for a -10+40=30

So angle A = 30