Question

In a triangle ABC ,D is the midpoint of side AC such that BD = 1/2AC. Show that angle ABC is a right angle​

Answer 1

Step-by-step explanation:

angles opposite to equal sides are equal

so by applying angle sum property in triangle ∆ABC

x + x + y + y = 180°

2(x+y)=180°

x+y=90°

so angle B is 90°