Question

a) What type of triangle is triangle ABC? b) Give reasons for your answer. I need the correct answer for B with Reasons Not "ab and ac are the same" any word other than the same ​

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