Isosceles trapezoid with its diagonals drawn

An example figure from the Trapezoid Generator.

An isosceles trapezoid with bases 12 and 6, both diagonals drawn and crossing at E, with a tick on each leg — An isosceles trapezoid ABCD with its bases labeled 12 and 6 and marked parallel, each leg marked with one congruence tick. Both diagonals are drawn and cross at a point named E. There is no height or other label, so students can show the diagonals are the same length.

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Answer key

Sides: AB = 12, BC = 5.8, CD = 6, DA = 5.8
Angles: ∠A = 59°, ∠B = 59°, ∠C = 121°, ∠D = 121°
Diagonals: AC = 10.3, BD = 10.3
Perimeter: 29.7
Area: 45

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