Question 47
Mensuration of Plane ShapesFind the area of an equilateral triangle of side 16cm.
- A.64√3cm2
- B.72√3cm2
- C.96cm2
- D.128√3cm2
- E.128cm2
Show the answer and explanation
Answer: A (64√3cm2)
Explanation
Area = ½ × 16 × 16 × sin 60° = 128 × √3/2 = 64√3cm2.