Question 3: Explain what is the formula of semi-circle perimeter? Answer: The circle’s circumference formula, C, is C = 2 * pi * r. A semicircle means half a circle. Therefore, in order to find the area of a semi-circle, one would need to divide the perimeter formula by two. Question 4: Explain how one can find the length of the arc? Answer ...

Fig. 15.18 shows a sector of a circle of radius r cm containing an angle θ ∘. The area of the sector is A c m 2 and the perimeter of the sector is 50 cm. Prove that A = 25 r − r 2 View Solution

Question 3: State the formula of the perimeter of a semi-circle? Answer: The perimeter of a circle is \(\pi\) × d. Here ‘d’ is the diameter of the circle. Hence, the perimeter of a circle is half of the that of the circle that is ½ \(\pi\) × d. Question 4: How to find the area of a circle?

Radius of circle is 7 cm. Find perimeter and area of the circle. View Solution. Q5.

Perimeter of full circle is given by $$2\pi r$$ Thus, perimeter of three quarters circle is given by, $$ \left (\dfrac{3}{4} \times 2 \pi r \right ) + (2 \times r) $$ The perimeter of this "circle" would be: $$ \left (\dfrac{3}{4} \times 2 \times \pi \times 18 \right ) …

Calculate the perimeter of a circle (of radius 'r') and a square (of side 'a'). View Solution. Q2.

(i) Calculate the perimeter and area of the semicircle whose radius is 14 cm. (ii) Calculate the perimeter and area of a quadrant circle of radius 7 cm.

A window is in the form of a semi-circle with rectangle on its diameter. Find the perimeter if The length and breadth of rectangle are 20, 14 c m

Find the area and perimeter of a square plot of land, the length of whose diagonal is 15 metres. Give your answer correct to 2 places of decimals. View Solution

Click here:point_up_2:to get an answer to your question :writing_hand:the perimeter in cm of a square circumscribing a circle of radius a cm