Find the measure of angle A. This is for my math class, and I’ve been stuck on this for a while. Please help!

20°

Step-by-step explanation:

The sum of angles in a ∆ = 180°

Therefore,

Use this expression to find the value of x, then find the measure of angle A.

Subtract 20 from both sides

Divide both sides by 20

Find measure of angle A.

Angle A is given as

Plug in the value of x and solve

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.