Area of a circle
Click the appropriate answer for each question:
1 Radius is ----- the diameter. half quarter three quarter equal
2 Diameter is ----- the radius.
half thrice twice equal
3 One fourth of a circle is called -----
semicircle sector of a circle arc of a circle quadrant
4 Radius of a circle is 14 cm \ its diameter is ------
14 cm 7 cm 28 cm 42 cm
5 Value of p is taken as -----
4.13 3 3.41 3.14
6 There can be ----- no. of radii in a circle.
one ten infinite fixed
7 The segment which passes through the centre of the circle is called ------
diameter radius chord arc
8 The segment which is drawn joining any two points on a circumference is called -----
9 A chord does not necessarily pass through the ------
circumference diameter centre radius
10 The outer surface of a circle is called ------
sphere circumference surface of a circle chord
11 Area of a circle -----
pr2 2pr 2prl 2pr2
12 Area of a sector of a circle -----
pr2 2pr2 q/360 x pr2 q/360 x 2pr
13 Circumference of a circle ------
2prl 2pr2 2pr pr2
14 Length of an arc = ------
2pr2 q/360 x pr2 2pr q/360 x 2pr
15 The line drawn from the centre of circle to any point on circumference is called ------ of a circle
diameter chord radius sector
16 Area of a semicircle ------
Pr2 2Pr2 1/2 P r2 2Pr
17 Area of a ring = -----
P[(r2)2-(r1)2] P(r2)2 P[(r1)2-(r2)2] P(r1)2
18 Ratio of circumference of a circle and its diameter is always a constant quantity
P (2Pr)/d (Pr)/d P/d
19 Circumference of a circle is 22 cm \ radius = ------
4.6 cm 4.2 cm 4.5 cm 3.5 cm
20 Find area of a sector of a circle whose central angle is 60o and its radius of the circle is 21 cm. \ Area of sector = -------
22 cm2 7 cm2 11 cm2 231 cm2
21 If the radius of a circle is 14 cm its circumference = ------
616 cm 88 cm 308 cm 44 cm
22 If the diameter of a circle is 14 cm. \ its circumference is ------ cm
88 cm 616 cm 48 cm 44 cm
23 The area of a ring whose outer radii is 16 and its inner radii is 12 cm is -----
272 cm2 300 cm2 352 cm2 284 cm2
24 If the radius of a circle is 14 cm.Then area of a quadrant = ------
616 sqcm 308 sqcm 154 sqcm 88 sqcm
25 If the radius of a circle is 7 cm.Then area of a quadrant = ------
154 sqcm 308 sqcm 38 sqcm 38.5 sqcm
26 The radius of a circle is 14 cm \ Perimeter of a semicircle is ------
44 cm 72 cm 28 cm 616 cm
27 If the area of a circle is 154 sqcm.Then radius of a circle = ------
49 cm 7 cm 24.5 cm 10 cm
28 If the inner and outer radii of a ring is 15 cm and 20 cm resp. \ Area of a ring = -----
400 sqcm 600 sqcm 550 sqcm 650 sqcm
29 If the radius of the circle is 21 cm. \ Area of a circle = ------
198 sqcm 693 sqcm 66 sqcm 1386 sqcm
30 If the central angle of the circle is 72o radius is 21. \ Area of sector of a circle = -------
277.19 308.08 205.18 348.09
31 If the circumference of a circle is 44 cm \ Radius of a circle = ------
7 cm 14 cm 18 cm 6 cm
32 If the radius of a semicircle is 14 cm \Perimeter of a semicircle = -----
92 cm 86 cm 72 cm 68 cm
33 If the length of the arc is 15.8 and radius is 5.7 cm \ Area of sector = ------
21.5 sqcm 9.65 sqcm 13.6 sqcm 45.03 sqcm
34 If the area of the circle is 1386 sqcm \ Radius of the circle = ------
18 cm 21 cm 20 cm 16 cm
35 Perimeter of a semicircle = -----
2Pr Pr2 2P+Pr 2r+Pr