Advertisements
Advertisements
प्रश्न
Match the following:
Column A | Column B |
(i) Area of a circle | (a) `1/4 pi"r"^2` |
(ii) Circumference of a circle | (b) (π + 2)r |
(iii) Area of the sector of a circle | (c) πr2 |
(iv) Circumference of a semicircle | (d) 2πr |
(v) Area of a quadrant of a circle | (e) `theta^circ/360^circ xx pi"r"^2` |
उत्तर
Column A | Column B |
(i) Area of a circle | (c) πr2 |
(ii) Circumference of a circle | (d) 2πr |
(iii) Area of the sector of a circle | (e) `theta^circ/360^circ xx pi"r"^2` |
(iv) Circumference of a semicircle | (b) (π + 2)r |
(v) Area of a quadrant of a circle | (a) `1/4 pi"r"^2` |
APPEARS IN
संबंधित प्रश्न
The measure of an arc of a circle is 80° and its radius is 18 cm. Find the length of the arc. (π = 3.14)
The area of a sector of a circle of 6 cm radius is 15 \[\pi\] sq.cm. Find the measure of the arc and length of the arc corresponding to the sector.
In Δ ABC, if ∠ A = 65° ; ∠ B = 40° then find the measure of ∠ C.
Find the length of an arc if measure of the arc is 90° and its radius
is 14 cm.
Measure of an arc of a sector of a circle is 900 and its radius is 7cm. Find the perimeter of the sector.
(A) 44 cm (B) 25 cm (C) 36 cm (D) 56 cm
A circle is inscribed in square ABCD of side 14 cm. Complete the following activity to find the area of the shaded portion.
Activity:
Area of square ABCD = ______
= 142
= 196 cm2
Area of circle = πr2 = `22/7xx 7^2`
= ____ cm2
Area of shaded portion = Area of square ABCD – Area of circle
= 196 – _______
= _____ cm2
For the sectors with given measures, find the length of the arc, area and perimeter. (π = 3.14)
central angle 45°, r = 16 cm
A circle of radius 120 m is divided into 8 equal sectors. Find the length of the arc of each of the sectors
Two gates are fitted at the entrance of a library. To open the gates easily, a wheel is fixed at 6 feet distance from the wall to which the gate is fixed. If one of the gates is opened to 90°, find the distance moved by the wheel (π = 3.14)
In the given figure, a rectangle ABCD is inscribed inside a semi-circle of radius 10 cm. Using the dimensions given in the figure, determine the area of the shaded region.