What is the approximate area, in square centimeters, of the logo?

Question

A logo is placed on a T-shirt. The logo is in the shape of a circle with a diameter of 7.6 centimeters.

Answer 1

What is the approximate area, in square centimeters, of the logo?
A logo is placed on a T-shirt. The logo is in the shape of a circle with a diameter of 7.6 centimeters.

 

Solution:

 

The area of the logo circle is A = π r² where r is the radius = Diameter/2

 

r = 7.6 cm/2 = 3.8 cm, and A = π (3.8 cm)² =  45.36 cm²

 

the area can also be computed as A = π ( D/2)² = π D²/4

 

A = π (7.6 cm)²/4 = π ( 57.76 cm²)/4 = 45.36 cm²