The circumference of a circle=2

r
We know that diameter is double the radius, and therefore can be written as d=2r
Circumference of a circle in terms of diameter is C=

d
The 2r cancels out
Answer:
R = 5 ft
Step-by-step explanation:
Pythagorean theorem
x² + 12² = (x + 8)²
x² + 144 = x² + 16x + 64
16x = 80
x = 5
Answer:
c
Step-by-step explanation: