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  5. When We Have a Trapezoid in a Problem, Draw the Altitudes

Toolkit 67

When We Have a Trapezoid in a Problem, Draw the Altitudes

Trapezoid ABCD with altitudes drawn from A and B to base DC

When working with a trapezoid, drawing the altitudes creates right triangles and often simplifies the problem.

Isosceles trapezoid with altitudes and equal side lengths
x=CD−AB2x=\frac{CD-AB}{2}x=2CD−AB​

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