Question

помогите решить!1!1!1!1

Answer 1

 $1) \ \ bold{S_{ABCT} = ab} rightarrow \ \ bold{S_{ABCT}} = 4cdot4 = 20 (cm)$

$2) \ \ bold{S_{CTD} = dfrac{1}{2}ab } rightarrow \ \ bold{S_{CTD} = dfrac{3cdot5}{2} = dfrac{15}{2} = 7,5; }$

$3) \ \ bold{S_{ABCD} = S_{ABCT} + S_{CTD}}}}} rightarrow \ \ S_{ABCD} = 20+7,5 = 27,5 (cm^2);$


$boxed{bold{OTBET: 27,5}}$