Advertisements
Advertisements
प्रश्न
Find the perimeter of the adjoining figure, which is a semicircle including its diameter.
उत्तर
Radius = `10/5`
= 5 cm
Circumference of semicircle = `(2pi r)/2`
= `2 xx 1/2 xx 22/7 xx 5`
= 15.71 cm
Total perimeter = Circumference of semicircle + Length of diameter
= 15.71 + 10
= 25.71 cm
APPEARS IN
संबंधित प्रश्न
A square of diagonal 8 cm is inscribed in a circle. Find the area of the region lying outside the circle and inside the square.
From each of the two opposite corners of a square of side 8 cm, a quadrant of a circle of radius 1.4 cm is cut. Another circle of radius 4.2 cm is also cut from the centre as shown in the following figure. Find the area of the remaining (Shaded) portion of the square. (Use π = 22/7)
In the following figure, OABC is a square of side 7 cm. If OAPC is a quadrant of a circle with centre O, then find the area of the shaded region. (Use π = 22/7)
In the following figure, ABC is a right-angled triangle, ∠B = 90°, AB = 28 cm and BC = 21 cm. With AC as diameter a semicircle is drawn and with BC as radius a quarter circle is drawn. Find the area of the shaded region correct to two decimal places.
Find the area of the largest triangle that can be inscribed in a semi-circle of radius runits.
A circular disc of radius 6 cm is divided into three sectors with central angles 90°,120° and 150°. What part of the whole circle is the sector with central angle 150°? Also, calculate the ratio of the areas of the three sectors.
Find the area of the segment shown in Fig. 2, if the radius of the circle is 21 cm and ∠AOB = 120° `( "Use" π = (22)/(7))`
The radius of a circular wheel is 42 cm. Find the distance travelled by it in :
(i) 1 revolution ;
(ii) 50 revolutions ;
(iii) 200 revolutions ;
A circular park is surrounded by a road 21 m wide. If the radius of the park is 105 m, find the area of the road.
If the radii of two circles are in the ratio of 4 : 3, then their areas are in the ratio of ______.
