Calculate the length of the boundary and the area of the shaded region in the following diagrams. All measurements are in centimetres.
(i) The unshaded part is a semicircle.
(ii) Four semicircles on a square.
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.