Question: how do you find the perimeter of an isosceles trapezoid?
Answer: The perimeter is the sum of the outer edge of the shape, so you just need to add the lengths of the sides. Because this is an isosceles trapezoid, the legs are the same length, so you can use 2c in the formula since both the legs are of equal length. Step 2: Substitute known values for variables: P = 5 + 10 + 2(7)