90-70= 20
angle 4= 20
90-50= 40
angle 6= 40
90-15= 75
angle 8= 75
Answer: 30 degrees
Step-by-step explanation:
Corresponding angles of similar triangles are congruent.
I did this manually on some notepaper but my scanner is not working.
The answer is 72 cm^2
I think the answer is D 150 degrees