Question

Can someone answer this question please answer it correctly if it’s corecct I will mark you brainliest please help me please

Answer 1

Answer:

First you find the radius R

We have, circumference = 2*3.14*R = 31.4

=> R =31.4/(2*3.14) =5

We have , area = 3.14*R^2 = 3.14*5^2 = 78.5

Step-by-step explanation:

Here we use pi =3.14.

Answer 2

Answer:

78.5 units²

Step-by-step explanation:

The circumference of a circle is denoted by: C = 2πr, where r is the radius. Here, we know that C = 31.4, so plug that in for C:

C = 2πr

31.4 = 2πr

2r = 9.99

r = 5.00 units

The area of a circle is denoted by: A = πr², where r is the radius. Here, we found r, so plug that in:

A = πr²

A = π * 5.00² ≈ 78.5 units²