Lesson 10 · The relation of triangles standing on the same base and lying between the same parallels

The relation of triangle and parallelogram standing on the same base and lying between the same parallel lines Presentation

MathematicsSubject
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Class 10 Mathematics · Geometry: Area

Triangle and Parallelogram on the Same Base

Same base · Same parallels · Triangle is half

By the end of this lesson you can

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Tell when figures are on the same base and between the same parallels

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Show by measuring that the triangle is half

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Prove the theorem with one construction

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Use it in number problems and the midpoint proof

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Presenter notes: Today we compare a triangle and a parallelogram that share a base and sit between the same two parallel lines. By the end you will know exactly how their areas are related, and you will be able to prove it.