Question : Find the perimeter (in cm) of a semicircle of radius 28 cm.

Option 1: 288

Option 2: 144

Option 3: 121

Option 4: 242

Question : The length of each side of an equilateral triangle is 22 cm. Find the area (in cm²) of this triangle.

Option 1: 121

Option 2: $242 \sqrt{3}$

Option 3: $121 \sqrt{3}$

Option 4: 242

Question : If $\triangle ABC$~$\triangle PQR$, the ratio of perimeter of $\triangle ABC$ to perimeter of $\triangle PQR$ is 36 : 23 and QR = 3.8 cm, then the length of BC is:

Option 1: $4 \frac{103}{121} cm$

Option 2: $3 \frac{109}{121} cm$

Option 3: $5 \frac{109}{115} cm$

Option 4: $3 \frac{107}{115} cm$

Question : Find the length of the arc whose central angle is 45° and the radius of the circle is 28 cm.

Option 1: 11 cm

Option 2: 33 cm

Option 3: 44 cm

Option 4: 22 cm

Question : What will be the perimeter (in cm) of the sector of a circle of radius 4.9 cm having a central angle 144° (use $\pi=\frac{22}{7})?$

Option 1: 21.12

Option 2: 23.32

Option 3: 23.23

Option 4: 22.12

Question : The perimeter of a minor sector of a circle of radius 5 cm is 15.5 cm. Find the area of the minor sector (use $\pi=\frac{22}{7}$ ).

Option 1: 17.53 cm²

Option 2: 13.75 cm²

Option 3: 13.57 cm²

Option 4: 17.35 cm²