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Geometry Level 1

Given an equilateral triangle with side length 5 units, find the area of the triangle in square units.

11 2 11\sqrt2 15 15 10 2 10\sqrt2 35 35 25 3 4 \frac{25\sqrt3}4 20 20 25 25

Adrian Richard Salazar by Adrian Richard Salazar , 29, Philippines

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1 solution

A = 3 4 x 2 = 3 4 5 2 = 25 3 4 A=\dfrac{\sqrt{3}}{4}x^2 = \dfrac{\sqrt{3}}{4}5^2 = \dfrac{25\sqrt{3}}{4}

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How do you know that the area is 3 4 x 2 \displaystyle \frac { \sqrt { 3 } } { 4 } x ^ { 2 } ?

. . - 2 months, 2 weeks ago

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