Answer:
A.
2 x 2 = 4 so 4 is the diameter because the diameter is double the radius
diameter x pi = circumference
4 x pi = 3pi or 12.56
8 x pi = 8pi or 25.12
Step-by-step explanation:
Answer:12.57
C=2πr
=2·π·2
=12.56637
2r + 3
probably
6
base + 2(legs) = 56 (2 legs are the same because it's isosceles)
x + 2(5x - 5) = 56
x + 10x - 10 = 56
11x -10 = 56
11x = 66
x = 6
D
Total area = 12 + 18 = 30cm²
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