Math, asked by tbadrakiya36, 7 months ago

In the following figure, ABC is an isosceles triangle with AB=AC and ZBAD = 28°, find ZDAC.​

Answers

Answered by kundansalunkhe15
2

Answer:

To prove : AB×EF=AD×EC

EC

AB

=

EF

AD

Proof :

AB=AC (∵ ABC is isosceles)

∴∠B=∠C (angles opposite to equal sides are equal) - (1)

In ΔABD and ΔECF

∠ABD=∠ECF (from (1))

∠ADB=∠EFC (Both are 90

)

Using AA similarity

ΔADB∼ΔECF

EC

AB

=

EF

AD

⇒AB×EF=AD×EC

∴ Hence proved.

solution

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