A blue triangle and a red rectangle with an extended side. Prove they have equal area.

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Please find here the video solution: Video: Lifting the veil.

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- Post author By Rik D. Tangerman
- Post date May 22, 2024
- 1 Comment on Lifting the veil

A blue triangle and a red rectangle with an extended side. Prove they have equal area.

Scroll down for a solution to this problem.

Please find here the video solution: Video: Lifting the veil.

- Tags area, proportion, rectangle, triangle

## One reply on “Lifting the veil”

As shown in figure draw BB’ perpendicular to AC.

Area of Rectangle = a.y

Area of Triangle ABC = (a.2Sin(x)Cos(x).y)/(2Cos(x))=a.y