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An equilateral triangle has a side 2 cm. Calculate the he...

An equilateral triangle has a side 2 cm. Calculate the height of the triangle.

An equilateral triangle has a side 2 cm. Calculate the height of the triangle.

A.

5cm

B.

$\sqrt5$ cm

C.

3cm

D.

$\sqrt{ 3}$ cm

View answer & explanation

Correct answer is D

using Pythagoras theorem

H = $\sqrt{ 2^2 - 1^2}$

= $\sqrt{ 4 - 1}$

= $\sqrt3$ cm

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