Question

ABC is an isosceles triangle with ab is equal to AC draw a perpendicular BC and show that angle b is equal to angle C

Answer 1

Given: In triangle ABC,AB=AC
To Prove: angle b= angle c
Proof: AB=AC (given)
         AD=AD (common)
        angleADB= angleADC= 90(AD is perpendicular to BC)
        Therefore, triangleADB≅triangleADC
        ⇒angles B and C are equal (CPCT)