q no. 21... plz....,.........
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First find AC that is diameter
AC=√24^2 + 7^2 = √576 +49= √625= 25
So radius = 25/2
Now area of triangle ABC = 1/2 × 24× 7= 84
Now take Area of semi circle + area of 90 degree sector = area of 3/4 th circle
= 3/4 × pie r^2
= 3/4 × 22/7 × 25/2× 25/2
= 41250/112
= 368.3
Now area of shaded = 368.3 -84= 284.3
AC=√24^2 + 7^2 = √576 +49= √625= 25
So radius = 25/2
Now area of triangle ABC = 1/2 × 24× 7= 84
Now take Area of semi circle + area of 90 degree sector = area of 3/4 th circle
= 3/4 × pie r^2
= 3/4 × 22/7 × 25/2× 25/2
= 41250/112
= 368.3
Now area of shaded = 368.3 -84= 284.3
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