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Nikolay [14]
3 years ago
5

Use π = 3 19. Calculate the area of a circle with diameter of 14cm

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
7 0
The equation for Area of circle:

A = πr²

Using pi as 3.14
r = radius, d = diameter

r = d/2
r = 14/2
r = 7

A = (3.14)7²
A = 49(3.14)
A = 153.86 cm²

Using pi as 3.19
A = πr²
A = (3.19)7²
A = 49(3.19)
A = 156.31cm²


hope this helps

Ilia_Sergeevich [38]3 years ago
6 0
Area of a circle = PI x r^2

you state pi = 3.19  ( it is usually 3.14, if it is a typo see below )

diameter = 14cm
 r = 1/2 the diameter, so r = 7 cm

area = 3.19 x 7^2

area = 3.19 x 49 = 156.31 square cm

( if PI = 3.14, area = 3.14 * 49 = 153.86 square cm)
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