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Area of a triangle

The triangle drawn inside its rectangle: the rectangle is base times height and the triangle is half of it. Right angled triangles first, then the height dashed inside, with a frame to fill in on every question.

A free key stage 3 and GCSE support geometry and measures lesson on area of a triangle, spec code G16. It has a lesson deck to teach from with a visualiser, a worksheet with answers, a puzzle, an exit ticket and an end of unit test.

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