Question

What is the gormiperimeter of a isosceles trapezium?

Answer 1

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. Substitute known values for variables.

Answer 2

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The bases (top and bottom) of an isosceles trapezoid are parallel. Opposite sides of an isosceles trapezoid are the same length (congruent). The angles on either side of the bases are the same size/measure (congruent).