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a trapezoid has an area of 20cm squared and a height of 5 cm. what is the sum of its top and bottom sides

Sagot :

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[tex]A=\frac{a+b}{2} h[/tex]
A - area
h - height
a+b - sum of its top and bottom sides

[tex]20=\frac{a+b}{2} \cdot 5 \\ 4 = \frac{a+b}{2} \\ a+b=8[/tex]

The sum of its top and bottom sides is 8 cm.
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