What is the area of a triangle with sides 13 cm, 14 cm and 15 cm?
Answer and explanation
Correct answer: D. 84 cm²
- Step 1: Semi-perimeter s = (13 + 14 + 15)/2 = 21.
- Step 2: Heron's formula: area = √(s(s-a)(s-b)(s-c)) = 84 cm².
Answer
84 cm².
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