Calculate the area of rectangle field where one side is 16 cm and diagonal 20 cm.
Answer & explanation
Correct answer: option 3
ACD isa right angle triangle,
let ,AC = 20 cm and AD = 16cm
By using pythagoras theorem,
AC² = AD² + DC²
20² = 16² + DC²
400 = 256 + DC²
DC = 12 cm
Area of rectangle = l × b
= 16 × 12
192 cm²
The correct answer is Option (3) → $192 ~cm^2$