The area of the triangle is 18 cm2, and the radius of the circle inscribed in the triangle is 4 cm, find the perimeter of the triangle.
| November 24, 2020 | education
The area of the triangle is: S = p * r, where p is the half-perimeter of the triangle,
r is the radius of the inscribed circle, hence the perimeter P of the triangle is:
P = 2 * S / r
P = 2 * 18/4 = 9 cm.
Answer. the perimeter of the triangle is 9 cm.
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