Triangles and parallelograms equal in area
Same parallels · Change the base, keep the area
Construct a parallelogram equal in area to a triangle
Construct a triangle equal in area to a parallelogram
Prove the areas equal using base and height
Triangle \( = \frac{1}{2} \times b \times h \)
Parallelogram \( = b \times h \)
Between the same parallels, the height is the same
Same base, same parallels: triangle is half the parallelogram
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