Question

Use the formula Upper A equals pi r squared to find the exact area of a circle if its radius is 2 StartRoot 5 EndRoot meters.?

square root

Answer 1

`A=20pi" square units"`

Explanation:

`• " area of circle (A) "=pir^2`

`r=2sqrt5`

`rArrr^2=2sqrt5xx2sqrt5`

`color(white)(rArrr^2)=2xx2xxsqrt5xxsqrt5=4xx5=20`

`rArrA=20pi" square units"`