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meowmeowcow
30.09.2019 •
Mathematics
Chloe dre a quadrilateral with 2 pairs of opposite sides thar are parallel. name all the shapes that could be chloe's quadrilateral.
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Ответ:
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Ответ:
Extend the sides AD and BP. This creates 2 congruent triangles using ASA. Triangles CBP and adjacent triangle are also congruent bc of ASA. This makes 3 congruent triangles (transitivity). That means just finding the area of the constructed large triangle, you find the area of the parallelogram. Since point P is the midpoint of B_, P_ also equals 9. Using the formula for the area of a triangle, and Pythagorean theorem (9-12-15), 12*18/2=108, which is the area of the parallelogram