Question

Use the circle to answer the questions.

A circle with radius 5.4 centimeters.

The diameter is
cm.



The circumference in terms of Pi is

Using 3.14 for Pi, the approximate circumference of the circle is
cm.

Answer 1

C = 10 π cm

Explanation:

Diameter is 2 x radius = 2*5.4 = 10.8 cm

radius r = 5 cm

diameter d = 10 cm

circumference C = 31.4 cm

area A = 78.5 cm2

In Terms of Pi π

circumference C = 10 π cm

area A = 25 π cm²

Formulas: Circle Formulas in terms of Pi π, radius r, and diameter d

Radius and Diameter:

r = d/2

d = 2r

Area of a circle:

A = πr2 = πd2/4

Circumference of a circle:

C = 2πr = πd

Answer 2

c

Explanation:

got it right on my test