True, A triangle with base 18 cm and height 8 cm has an area of 72 cm²., The longer base and the shorter base of a trapezoid are parallel., The height of a trapezoid must be perpendicular to the bases., False, A trapezoid with bases 20 cm and 10 cm, height 6cm has area 60 cm²., The area of a triangle is found by adding the base and the height., The area of a trapezoid is found by multiplying the longer base and the shorter base.

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