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Question

If two sides of a triangle are equal the angles opposite to them are also equal why?
  1. undefined
  2. undefined
  3. undefined
  4. undefined


Solution

The correct option is

We have ΔABC with AB = AC
AD is the altitude
In ΔADB & ΔADC
AB = AC (Given)
AD = AD (Common)
ADB=ADC=90
By RHS congiuency condition
ΔADBΔADC ABC=ACB(CPCT)

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