Start learning →

Find the area of an equilateral triangle whose side is $6$ cm.

A$6\sqrt{3}$ cm²
B$9\sqrt{3}$ cm²
C$12\sqrt{3}$ cm²
D$18$ cm²
Answer & Solution
Correct answer: B. $9\sqrt{3}$ cm²
Area of equilateral triangle $= \dfrac{\sqrt{3}}{4} \times \text{side}^2 = \dfrac{\sqrt{3}}{4} \times 36 = 9\sqrt{3}$ cm².
Practise this question with Quill — AFCAT →

Keep practising Mensuration: Surface Areas & Volumes

Browse all Mensuration: Surface Areas & Volumes questions for AFCAT, or explore more Mathematics topics.

Start a Mensuration: Surface Areas & Volumes lesson →
Related questions
In a right-angled triangle the hypotenuse is $13$ cm and one of the legs is $5$ cm. Find tA circle has area $154$ cm². Find its circumference (take $\pi = \dfrac{22}{7}$).A rectangle has area $48$ cm² and breadth $6$ cm. Find its length.Find the area of a square whose side is $7$ cm.