Find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm.
Heron's Formula
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Question

Find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm.

KnowledgeBoat · Accepted Answer

Let a, b and c be the sides of the triangle. Let a = 18 cm, b = 10 cm. Given, Perimeter = 42 cm ∴ a + b + c = 42 ⇒ 18 + 10 + c = 42 ⇒ 28 + c = 42 ⇒ c = 42 - 28 = 14 cm. By formula, Semi Perimeter (s) = = 21 cm. By Heron's formula, Area of triangle (A) = sq.units Substituting values we get : Hence, area of triangle = cm².

Mathematics

Find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm.

Heron's Formula

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Mathematics

Find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm.

Heron's Formula

Related Questions

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