Ad is the height of triangle ABC, AB is equal to 10, ad is equal to 8, BC is equal to 12, triangle ABCD is isosceles triangle
∵AD⊥BC AB=10 AD=8
Ψ BD = 6 (Pythagorean theorem)
∵BC=12
∴DC=6 ∴AC=10
∴AB=AC
The triangle ABC is an isosceles triangle