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the formula for a perimeter of a rectangle is P= 2x(l+w) P=2(50+84) P=2(134) P=268
A trapezoid has 2 parallel sides and 2 that are not.
a = a/2*b*sinC Multiply both sides of the equation by 2 to eradicate the fraction: 2*a = a*b*sinC Divide both sides by a*b which will enable you to cancel out "a" and also make sinC the subject: sinC = 2/b
a paper
a parallelogram has 2 slanted sides and 2 straight sides