Interior and Exterior Angles of Triangles

Front

What is an interior angle of a triangle?

Back

An interior angle of a triangle is formed by two sides of the triangle and is located inside the triangle.

Front

What is an exterior angle of a triangle?

Back

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

Front

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

Back

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

Front

What is the relationship between an exterior angle and the two remote interior angles?

Back

An exterior angle is equal to the sum of the two remote interior angles.

Front

Define remote interior angles in relation to a given angle in a triangle.

Back

Remote interior angles are the two interior angles that are not adjacent to a given exterior angle.

Front

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

Back

The third angle measures 70 degrees (180 - 50 - 60 = 70).

Front

What is a translation in geometry?

Back

A translation is a transformation that moves every point of a shape the same distance in the same direction.

Front

What is a reflection in geometry?

Back

A reflection is a transformation that flips a shape over a line, creating a mirror image.

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a shape around a fixed point at a certain angle.

Front

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

Back

To find the measure of an exterior angle, add the measures of the two remote interior angles.