What is the area of a circle with a diameter of 15 mm? Use 3.14 for pie. Round to the nearest tenth.

Question

Mathematics

Friday

15 August, 19:47

What is the area of a circle with a diameter of 15 mm? Use 3.14 for pie. Round to the nearest tenth.

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Answers (2)

Know the Answer?

Kobe Rivas · Answer 1

47.1

Step-by-step explanation:

A=PIEr^2

if you have the diameter you dont need to square it so it is simply PIE (15)

then you get 47.1238898

round it

47.1

Matteo Becker · Answer 2

176.6 mm^2

Step-by-step explanation:

We need to find the radius

r = d/2

r = 15/2 = 7.5

We want the area of a circle

A = pi r^2

A = pi * (7.5) ^2

= 3.14 * 56.25

=176.625

Rounding to the nearest tenth

176.6 mm^2