Question

The altitude of an equilateral triangle is 6 cm.Its perimeter is :

A) 4√3cm
B) 5√3cm
C) 12√3cm
D) 5√3cm​

Answer 1

Answer:

As ABC is an equilateral triangle, AB = BC = AC. Also, AD is perpendicular to BC, therefore, ∠ADC = 90°. So, the correct answer is “20.76 sq. cm”.