Answer:
m∠A= 52 degrees
Step-by-step explanation:
(Every triangle equals 180 degrees)
First you have to find angle C.
Step 1- Subtract
180-105= 75 *The line is a 180 degree angle
Now that you have the measure for two angles, you subtract.
53+75+x=180
128+x= 180
-128 -128
x=52
