Question

What type of triangle is triangle ABC give reasons for your answer help please I need 1 more mark But I don't know what I'm doing wrong ​

Answer 1

Answer: isosceles

Explanation:

By the alternate interior angles theorem,
`\angle CAB=50^(\circ)`

Since angles in a triangle add to 180 degrees,
`\angle ACB=180^(\circ)-80^(\circ)-50^(\circ)=50^(\circ)`

Since sides opposite equal angles in a triangle are equal,
`AB=BC`.

So, triangle ABC is isosceles