Question

What is the approximate perimeter of this triangle?

Answer 1

• 163.6 in

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Given:

• a = 56 in,
• m∠A = 55°.

Find the missing sides:

• 56/b = tan 55° ⇒ b = 56 / tan 55° = 39.21 in,
• 56/c = sin 55° ⇒ c = 56 / sin 55° = 68.36 in.

Perimeter is:

• 56 + 68.36 + 39.21 =
• 163.57 ≈ 163.6 in