The length of a rectangle is 6 cm. The diagonal of the rectangle is 10 cm. What is the perimeter (in cm) of the rectangle?
Show answer & explanation
Correct answer: B
Explanation
Given:
Length = 6 cm
Diagonal = 10 cm
According to the formula:
Diagonal² = Length² + Width²
Perimeter = 2(Length + Width)
10² = 6² + Width²
100 = 36 + Width²
Width² = 64
Width = 8 cm
Perimeter = 2(6 + 8) = 2 × 14 = 28 cm