Question

PLZ HELP DONT UNDERSTAND!!!

Answer 1

$\bf \textit{area of a triangle}=A=\cfrac{1}{2}bh\qquad \begin{cases} b=base\\ h=\textit{height or altitude} \end{cases}\\\\ -----------------------------\\\\ \textit{area of a trapezoid}\\\\ A=\cfrac{h}{2}(a+b)\qquad \begin{cases} a=\textit{base, or one of the parallel sides}\\ b=\textit{base, or the other parallel side}\\ h=\textit{height, the distance between both}\\ \qquad \textit{parallel sides} \end{cases}$