What is the area of a circle that is 3 inches?

28.26 in²

Step-by-step explanation:

Radius = 3

Area = pi × r²

3.14 × 3²

28.26

28.27 inches^2

Step-by-step explanation:

The area of a circle can be found using:

a= pi* r^2

We know r, or the radius is 3, so we can substitute that in

a= pi * 3^2

a=pi *9

a=28.2743339...

The area is about 28.27 inches^2

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

the anwser is d) 75°

step-by-step explanation: