Question

answer this qureshion​

Answer 1

Answer:

Adjacent angles of parallelogram are supplementary

3x + 10 + x + 20 = 180

3x+x+10+20=180

4x+30=180

4x=180-30

4x=150

x=150/4

x=37.5

now,

3x + 10 = 122.5°

x+20= 57.5°

opposite angles are congruent