In given figure, PQR is a triangle right angled at P, with PQ = 21cm and PR = 42cm with the vertices P, Q and R as centres, arcs are drawn each of radius 10 cm. Find the area of shaded region.
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Area of triangle = 1/2bh
=441
The 3 sectors form a semicircle since the sum of angles of triangle is 180
Therefore, area of semicircle= 1/2 x 3.14 x r2
=157
Area of resulting figure = are of triangle - area of semicircle
=441 - 157 = 284cm2
=441
The 3 sectors form a semicircle since the sum of angles of triangle is 180
Therefore, area of semicircle= 1/2 x 3.14 x r2
=157
Area of resulting figure = are of triangle - area of semicircle
=441 - 157 = 284cm2
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