Answer:
angle b = 21 degrees
Step-by-step explanation:
102+57+ x =180 all triangles equal 180 degrees so set equal to 180
159+ x =180
x= 21
Answer:
The answer is 21 degrees.
Step-by-step explanation:
First of all, you should know that all the triangle sides add up to 180 degrees. Add up all the degrees, 102 + 57 + x.
102 + 57 + x = 180
159 + x = 180
x = 21
