Question

A chemistry teacher makes a sign for the door to the room that contains the chemicals used in class. The danger sign is shapedlike an equilateral triangle. Estimate the area of the sign to the nearest tenth of a square inch.18 in.

Answer 1

Area of an equilateral triangle =(√3 /4) *a^2

Where:

a = side length = 18 in

Replacing:

A = (√3 /4) *18^2 = 140.3in 2