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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` |
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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` |
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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 π sq. cm. Find the measure of the arc and the length of the arc corresponding to the sector.
In the given figure, square ABCD is inscribed in the sector A - PCQ. The radius of sector C - BXD is 20 cm. Complete the following activity to find the area of shaded region
Find the length of an arc if measure of the arc is 90° and its radius
is 14 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
For the sectors with given measures, find the length of the arc, area and perimeter. (π = 3.14)
central angle 120°, d = 12.6 cm
A circle of radius 120 m is divided into 8 equal sectors. Find the length of the arc of each of the sectors
In the given figure `square`ABCD is a square of side 50 m. Points P, Q, R, S are midpoints of side AB, side BC, side CD, side AD respectively. Find area of shaded region
The perimeter of an arc of radius 4.2 cm is 12.8 cm. Determine the angle subtended by the arc at the centre of circle.
