Semicircle

How do you find the area of semicircular region?

The central angle of a semicircle is

The perimeter of the semicircular bed flower is $360 \mathrm{cm}$. Find the length of curved edge (in $\mathrm{cm})$. [Take $\mathrm{\pi }=\frac{22}{7}$]

Find the length of semi-circular arc, given the diameter of the circle

The wall around a semicircular garden is $180 \mathrm{m}$ long. The area of the garden is (Take $\mathrm{\pi }=\frac{22}{7}$)

AB is the diameter of the semicircle shown. Find $m(\angle DAB)=\alpha$.

An angle in a semi-circle can also be acute.

Define semicircle? Explain by drawing a picture.

If in any circle, $\mathrm{arc} AB=\mathrm{arc} BA$, then the arc is

Measurement of angle subtended by an arc at the centre is $180°$, then the arc is

Draw a circle of radius $2.5 \mathrm{cm}$, whose centre is $\mathrm{O}$. Divide this circle in two semi circle.

Write down by looking at the adjoining picture:

Name of a semicircle.

The perimeter of a semi-circular protractor is 32.4 cm. Calculate the radius of the protractor in cm