Answer:
Isosceles
Explanation:
This triangle is an isosceles triangle, this is because in an isosceles triangle, two angles MUST be congruent.
In a scalene triangle, they are all different
In an isosceles triangle, two angles MUST be congruent
In an equiangular triangle, all three angles MUST be congruent.
A common way that I learned to remember this is
SIE, S=scalene, I=isosceles, e=equiangular.
The good thing to remember about this is the placement of the letters in SIE.
The S is in the first place, indicating the angles in a scalene triangle are going to be different because they are individual angles (1 angle) The I in SIE is in the second place, because isosceles triangles have 2 congruent angles. Finally, equiangular triangles are triangles that have 3 congruent sides.
Examples of each 3 main types of triangles
S = any 3 different angles that add up to 180 degrees.
I = any 2 numbers that are the same, but add up with another number to equal 180 degrees
E= any 3 numbers that are the same, and add up to equal 180 degrees.
I hope this helps to answer and explain your problem and how you can spot the main types of triangles!