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zloy xaker [14]
3 years ago
6

The diagram represents the circular floor under the dome of a state capitol building. The diameter is 40 feet. Find the area of

the floor. Use 3.14 for π.

Mathematics
2 answers:
Daniel [21]3 years ago
5 0
A  = pi . r^2

A = 3.14 x 20^2

A = 1256 ft^2

Hope this helps
Aleks04 [339]3 years ago
3 0

Answer:

1256 ft^2

Step-by-step explanation:

Area (A) of a circumference is A = π*r^2, where r is the radius of the circumference.

Taking into account that r = D/2, where D is the diameter of the circumference, therefore, the area formula can be written as

A = π*r^2

A = π*(D/2)^2

π*(D^2)/4

For this exercise, the diameter is 40 feet, hence

A = π*(D^2)/4 = 3.14*(40^2)/4 = 1256 ft^2

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