CBSE Class 10 Maths Areas Related to Circles
Area of a circle with radius __ is greater than the sum of areas of two circles of radii r cm each.
If the area of a sector is of the area of the circle, then what is the central angle of the sector?
What part of the circle is swept by the minute hand of a clock between the time 12:00 AM and 12:15 AM?
Please solve this question ?
- How to prove that opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre of the circle
Find area of shaded region
- Two circular pieces of equal radii and maximum area, touching each other are cut out from a rectangular card board of dimensions 14 cm 7 cm. Find the area of the remaining card board. Use pie=22/7
- In the figure, a square OABC is inscribed in a quadrant OPBQ. If OA = 20 cm, find the area of the shaded region.
- The inside perimeter of a running track shown in the figure is 400 m. The length of each of the straight portions is 90 m, and the ends are semi-circles. If the track is 14 m wide every where, find the area of the track. Also, find the length of the outer boundary of the track.
- Four equal circles are described about four corners of a square so that each touches two of the others, as shown in the figure. Find the area of the shaded region, if each side of the square measures 14 cm.
- In triangle ABC, angle A = 90o, AB = 12 cm and BC = 20 cm. Three semi-circles are drawn with AB, AC and BC as diameters. Find the area of the shaded portion.
- In the figure, ABC is an equilateral triangle of side 12 cm. The circle is centered at A with radius 6 cm. Find the area of the shaded region.
- Find the area of the region ABCDEFA shown in the figure, given that ABDE is a square of side 10 cm, BCD is a semi- circle with BD as diameter, EF = 8 cm, AF = 6 cm and angle AFE = 90o.
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