A rectangle has a length of 8 cm and its diagonal measures 10 cm. What is the perimeter of this rectangle?

Explanation

Given the length is 8 cm and the diagonal is 10 cm, use the Pythagorean theorem to find the width: width = √(10² - 8²) = √(100 - 64) = √36 = 6 cm. The perimeter is 2 × (length + width) = 2 × (8 + 6) = 28 cm.