The sides of the trapezoid are 13cm and 15cm and the perimeter is 48cm. Find the middle trapezoid.

univerkov | June 14, 2021 | education

Knowing the perimeter of the trapezoid and the lengths of its lateral sides, we find the sum of the lengths of its bases. BC + AD = Ravsd – AB – CD = 48 – 28 = 20 cm.

Since the middle line of the trapezoid is equal to the half-sum of the bases, then KM = (BC + AD) / 2 = 20/2 = 10 cm.

Answer: The length of the middle line of the trapezoid is 10 cm.

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