Draw a semi-circle with centre `O` and radius 5 cm. Is the diameter that determines the semi-circle, a part of the semi-circle?

Draw a semi-circle with centre O and radius 5cm. Is the diameter that determines the semi- circle,a part of the semi-circle?

Answer the following questions: Draw a semicricle with centre O and radius 2 cm. Is the diameter that determines the semicircle, a part of semi circle? Give reasons.

Semi-Circles

Angle in a semi-circle is :

Area of semi-circle is ……….

The figure shows a rectangle ABCD with a semi-circle and a circle inscribed inside it as shown. What is the ratio of the area of the circle to that of the semi-circle ?

The figure shows a rectangle ABCD with a semi-circle and a circle inscribed inside it as shown. What is the ratio of the area of the circle to that of the semi-circle ?

Angle is a semi-circle is………

When an arc becomes a semi circle ?