CBSE Class 10 Math 2023 All India Set-1 Solved Paper

Question : 28 of 38

Marks: +1, -0

In the given figure,

{\E}

is a point on the side

{\CB}

produced of an isosceles triangle

{\ABC}

with

{\AB}= {\AC}

. If

{\AD} ⟂ {\BC}

and

{\EF} ⟂ {\AC}

, then prove that

△ {\ABD} ∼ △ {\ECF}

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