Find the radius and the circumference of a circle?

Find the radius and the circumference of a circle whose area is 144π cm².

Solution:

More Solutions:

• Then the area of the resulting triangle:
• The circumference of the circle with diameter 28 cm:
• Then the radius of the circle is:
• If the ratio of the radii of two circles is 2:
• The perimeter of a semicircle (including its diameter) of radius 7 cm is:
• Area of a rectangle and the area of a circle are equal.
• Find the area of the trapezium ACDE.