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BBC7 年

Area of triangles - KS3 Maths - BBC Bitesize

Learn about the area of triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.
BBC2 年

How to show the area of a triangle is ½ × base × height

The area of this rectangle is base × height. So you've shown the area of the triangle is half this rectangle = ½ base × height.