Classifying Triangles and Triangle Sum Theorem FLASHCARD

Front

What is an equiangular triangle?

Back

An equiangular triangle is a triangle in which all three angles are congruent.

Front

What are the measures of the angles in an equilateral triangle?

Back

The angles in an equilateral triangle are all 60 degrees.

Front

How do you calculate the measure of the third angle in a triangle if two angles are known?

Back

To find the measure of the third angle, subtract the sum of the known angles from 180 degrees.

Front

What type of triangle has all sides of equal length?

Back

An equilateral triangle has all sides of equal length.

Front

What type of triangle has at least two sides of equal length?

Back

An isosceles triangle has at least two sides of equal length.

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

If a triangle has angles measuring 45 degrees and 75 degrees, what is the measure of the third angle?

Back

The measure of the third angle is 60 degrees.

Front

What is the definition of a scalene triangle?

Back

A scalene triangle is a triangle in which all sides and angles are of different lengths and measures.

Front

What is the relationship between the angles in an equiangular triangle?

Back

In an equiangular triangle, all angles are equal and each measures 60 degrees.

Front

How can you identify an isosceles triangle?

Back

An isosceles triangle can be identified by having at least two equal sides and two equal angles.