Question

What type of triangle is shown?

Answer 1

Answer:

c. isosceles

Step-by-step explanation:

the base angles are the same

Answer 2

Answer:

Isosceles

Step-by-step 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!