Question

Find the circumference and the area of a circle with radius 5 cm.

Write your answers in terms of n, and be sure to include the correct units in your answers.

Answer 1

area 78.54cm² circumference 31.42cm

Explanation:

to find the circumference you multiply the radius by two, to find the area use the equation A=πr2=π·52 to get 78.53982cm² which is simplified to 78.54cm²

Answer 2

The circumference of the circle is 10π cm, and the area is 25π cm².

The formulas for the circumference (C) and area (A) of a circle in terms of

the radius (r) are:

Circumference (C) = 2πr

Area (A) = πr²

Given that the radius (r) is 5 cm, we can substitute this value into the formulas:

Circumference (C) = 2π(5) = 10π cm

Area (A) = π(5)² = 25π cm²

So, the circumference of the circle is 10π cm, and the area is 25π cm².