Mathematics, 03.07.2019 00:00 ccarwile01
What is the area of trapezoid abcd ? enter your answer as a decimal or whole number in the box. do not round at any steps.
Answers: 2
![\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ A(\stackrel{x_1}{-1}~,~\stackrel{y_1}{5})\qquad B(\stackrel{x_2}{3}~,~\stackrel{y_2}{2})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ AB=\sqrt{[3-(-1)]^2+[2-5]^2}\implies AB=\sqrt{(3+1)^2+(2-5)^2} \\\\\\ AB=\sqrt{16+9}\implies \boxed{AB=5}](/tpl/images/0044/3779/99b02.png)
![\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ D(\stackrel{x_2}{-13}~,~\stackrel{y_2}{-11})\qquad A(\stackrel{x_1}{-1}~,~\stackrel{y_1}{5}) \\\\\\ AD=\sqrt{[-1-(-13)]^2+[5-(-11)]^2}\implies AD=\sqrt{(-1+13)^2+(5+11)^2} \\\\\\ AD=\sqrt{144+256}\implies AD=\sqrt{400}\implies \boxed{AD=20}](/tpl/images/0044/3779/edfec.png)
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