Unique, more than one, or no triangle

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

If two angles of a triangle are known, how can you find the third angle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the Triangle Inequality Theorem?

Back

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum would exceed 180 degrees.

Front

What is a unique triangle?

Back

A unique triangle is one that can be formed with a specific set of side lengths or angle measures.

Front

What does it mean for a triangle to be congruent?

Back

Two triangles are congruent if they have the same size and shape, meaning all corresponding sides and angles are equal.

Front

What is an example of side lengths that cannot form a triangle?

Back

The lengths 2, 4, and 5 cannot form a triangle because 2 + 4 is not greater than 5.

Front

How many triangles can be formed with angles 80°, 50°, and 50°?

Back

More than one unique triangle can be formed with these angles.

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length.

Front

What is a scalene triangle?

Back

A scalene triangle has all sides of different lengths.