Question

Find area of an equilateral triangle with side 12 cm. Also find length of its altitude.

Answer 1

Area of the triangle = √34√34 a² square units 

= √34√34 × 12 × 12 

= 36√3 cm²

= 36 × 1.732 cm² 

= 62.28 cm²

Height of the triangle = √32√32 a units

= √32√32 × 12 cm 

= 1.73 × 6 cm 

= 10.38 cm