Question 11
Mensuration of Plane ShapesFind the area of a rectangle of length 4cm and whose diagonal is 8cm. (Leave your answer in surd form)
- A.8√3 cm2
- B.12√3cm2
- C.16√2cm2
- D.16√3cm2
Show the answer and explanation
Answer: D (16√3cm2)
Explanation
The other side = √(82 − 42) = √48 = 4√3 cm. Area = 4 × 4√3 = 16√3 cm2.