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The area of a triangle is expressed using the formula A=(1/2)(bh)

Where A is area

Where B is length of the base of the triangle.

Where H is the height of the triangle.

The area of a rectangle is A=BH,

Where B is the length of the base of the rectangle.

Where H is the height of the rectangle.

Because a triangle, essentially, is a half of a rectangle, you find the area of the whole rectangle that the triangle comes from, then divide that in half.

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Q: How is the triangle formula derived from the area of rectangles?
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