Triangles and Angle Relationships

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees

Front

What is the definition of a remote interior angle in relation to an exterior angle?

Back

A remote interior angle is an angle that is not adjacent to the exterior angle and is inside the triangle.

Front

If one angle of a triangle measures 50 degrees and another measures 60 degrees, what is the measure of the third angle?

Back

70 degrees

Front

What is the relationship between the angles in similar triangles?

Back

The corresponding angles in similar triangles are equal.

Front

What is the definition of an exterior angle of a triangle?

Back

An exterior angle is formed by one side of the triangle and the extension of an adjacent side.

Front

How do you find the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two remote interior angles.

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

What is the definition of congruent triangles?

Back

Congruent triangles are triangles that are identical in shape and size, meaning their corresponding sides and angles are equal.

Front

How can you determine if two triangles are similar?

Back

Two triangles are similar if their corresponding angles are equal or if their sides are in proportion.

Front

What is the definition of an acute triangle?

Back

An acute triangle is a triangle in which all three angles are less than 90 degrees.