Semi-Circles

Semi-circle the end -points of a diameter of a circle divide the circle into two parts; each part is called a semi-circle.

Semi-circle has rotational symmetry of order 2.

Areas Related To Circles - Perimeter|Area|Semi Circle|Area Of A Ring|OMR

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?

If diameter of semi-circle is 7 cm then perimeter 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 in a semi -circle at the centre is …….

Angle is a semi-circle is………