Answer:
m∠8 = 123°
Step-by-step explanation:
<em>∠1 and ∠8 are alternate exterior angles</em>, and since lines A and B are parallel, then <em>they must be congruent</em>.
So, m∠1 = m∠8
Substitute: 123 = m∠8
5
5x3=15
15+6=21
Hope this helped pls give brainliest
Height
A=2πrh+2πr2
2^3 - (30 / 5) + 9
8 - (6) + 9
2 + 9
11 is your answer
