Find the circumference of the circle. Use your calculators value Pi. Round your answer to the nearest tenth.

The circumference of the circle is 75.37 mi.

Solution:

Area of the circle = 452.4 mi²

The value of π = 3.14

Let us first find the radius of the circle.

Area of the circle formula = sq. units

Divide by 3.14 on both sides of the equation, we get

                                       r² = 144.07

Taking square root on both sides of the equation.

                                      r = 12.003 mi

Circumference of the circle = 2πr

                                              = 2 × 3.14 × 12.003

                                              = 75.37884

                                              = 75.37 mi

Hence the circumference of the circle is 75.37 mi.

We have to identify the statement which best describes the dimensions of a plane.

A plane is a flat, two-dimensional surface with zero thickness that extends infinitely far.

A plane has two dimensions because it is a flat surface that has length and width but no depth.

So, plane has 2 dimensions.

So, Option C is the correct answer.