Hard Math Class 9 Level 1

Using Heron's formula what is the area of a triangle with sides 13 cm 14 cm and 15 cm?

हीरोन सूत्र से 13 cm 14 cm और 15 cm भुजाओं वाले त्रिभुज का क्षेत्रफल क्या है?

A 72 cm² / 72 cm² B 84 cm² / 84 cm² C 90 cm² / 90 cm² D 96 cm² / 96 cm²
Show answer and explanation
Correct Answer

B. 84 cm² / 84 cm²

Explanation

s = 21 and area is √(21×8×7×6) = √7056 = 84 cm².

s = 21 और क्षेत्रफल √(21×8×7×6) = √7056 = 84 cm²।

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