if the length of the sides of the triangle are 9,12,15.find the circum radius of triangle
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The triangle is a perpendicular triangle.
The formulae for finding the radius of circle inscribed is r=sΔ
where Δ= Area of triangle
s=2sumofallthesides
s=212+15+9=18
Δ=21×12×9=54
So, r=1854=3.
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