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GarryVolchara [31]
2 years ago
9

a) The difference between the circumference and the diameter of a circle is 90cmFind the radius of the circle​

Mathematics
1 answer:
Sveta_85 [38]2 years ago
8 0

Answer:

r=21.01 cm

Step-by-step explanation:

2r = diameter

Circumference of a circle = pi 2r

difference = 90

pi2r - 2r =90

 2r (pi-1) =90

90/(2(pi-1) = r = 21.01 cm

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