Respuesta :

asmaNasr

Step-by-step explanation:

it's a square so

AB=BC=CD=DA

BC=15

AC=

[tex] {ac}^{2} = {15}^{2} + {15}^{2} \\ ac = \sqrt{450} = 21.21 = 21.2[/tex]

ED = AC/2= 10.6

m<ABC= 90°

m<CED=90°

m<ADE=45°

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good job