The height of an equilateral triangle measures 9 cm. Find its area, correct to 2 decimal places. Take =1.732.
Let us assume a be the side of the equilateral triangle
We know that,
Height of an equilateral triangle = a units
Height 0f the equilateral triangle = 9 cm (Given)
= (Rationalizing the denominator)
=
= 6
Base of the triangle =
We know that,
Area of triangle =
= × 6 × 9
= 27
= 27 × 1.732
= 46.76 cm2 (Up to 2 decimal places)