Question

In square ABCD, AD=13, find each missing value
BC=?
AC=?
BD=?
EC=?
measure of DAB=?
measure of AEB=?
measure of CBD=?
measure of BAC=?

Answer 1

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Answer 2

AD=BC=13

AC=√13^2+13^2

=√401

AC=BD=√401

EC=√401/2

DAB=90°(square)

AEB=90°(square)

Consider ∆CBD,

CBD=45°(CB=CD)

Consider ∆BAC,

BAC=45°(BA=BC)

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