18. Why is a trapezoid not a paralelogrome a. It has 4 right angles. b. It has only 1 pair of parallel sides. c. It has 2 pairs of parallel sides. Pensar
[tex] {?}^{2} \times \frac{?}{?} \sqrt{ \sqrt[ {x}^{2} \times \frac{?}{?} ]{?} } [/tex]
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