Answer: r = 12.1cm, d = 24.2cm, Area = 460.0cm²
Step-by-step explanation:
From the formula,
Circumference of a circle = πd or 2πr.
To find the radius, we have to equate 76 cm to πd or 2πr and make r or d the subject of the formula. Now
76 = 2πr, don't forget that
π = 22/7 or 3.142
Now make r the subject of the formula
r = 76/2π
= 76/2 x 3.142
= 76/6.284
= 12.1 cm
d = 2r
= 2 x 12.1
= 24.2cm.
Area of the circle is πr²
= 3.142 x (12.1)²
= 3.142 x 146.41
= 460.0 cm²
