WOLFRAM|DEMONSTRATIONS PROJECT

The Third Pedal Triangle of a Triangle

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∠A
≈
65.67°
∠B
≈
61.08°
∠C
≈
53.25°
∠A'
≈
65.67°
∠B'
≈
61.08°
∠C'
≈
53.25°
The triangle formed by projecting a point onto the sides of a triangle is a pedal triangle.
The pedal triangle of a point with respect to the pedal triangle with respect to the pedal triangle with respect to the triangle is similar to the triangle.
Drag the red points to change the figure.