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The circle is inscribed by the triangle. Find the perimeter of the triangle.

A. 11 in.
B. 13 in.
C. 24 in.
D. 26 in.

The circle is inscribed by the triangle. Find the perimeter of the triangle. A. 11 in-example-1

1 Answer

2 votes

Answer:

Option D. 26 in

Explanation:

In the given ΔABC

Side BC = 2 + 5 = 7 in.

Side AB = AD + BD = 6 + 2 = 8 in. [ since length of tangents BD and BF to the circle inscribed are equal ]

From Pythagoras theorem

AC² = AB² + BC² = 8² + 7² = 64 + 49 = 113

AC = √113 = 10.63 in

Now perimeter of ΔABC = AB + BC + AC = 8 + 7 + 10.63 = 25.63 ≈ 26 in

Therefore Option D. 26 in is the correct choice.

User Andy Valerio
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