Question

What type of triangle is triangle ABC?
Give reasons for your answer.

Answer 1

Answer: isosceles

Step-by-step explanation: 2 of its sides are congruent, and its bottom 2 angles are congruent

Answer 2

Answer:

Isosceles [A triangle that has two equal arms is called an isosceles triangle]

Step-by-step explanation:

∠BAC=∠ACB

thus, AB=BC

Prove,

∠BAC=∠ACD=50° ;[AB║DE]

∠ABC=∠BCE=80°  ;[AB║DE]  

∠ACD+∠ACB+∠BCE = 180°

50°+∠ACB+80° = 180°

∠ACB = 180°- 130° = 50°