4.6 Trapezoids
The perimeter of a trapezoid is the sum of all its sides.
Perimeter of LMNO = a + b_{1} + a_{1}
+ b
Figure 4.5
If a trapezoid MNPQ which is congruent to LMNO is drawn on seg.MN a parallelogram LQPO is obtained ( figure 4.6).
Figure 4.6
Area of a parallelogram LQPO = 2 Area of trapezoid LMNO
( a + a_{1} ) h = 2 Area of trapezoid LMNO
\ Area of trapezoid LMNO =
Area of a trapezoid is half the product of the sum of its bases with its altitude.
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