Triangles

Front

What is an exterior angle of a triangle?

Back

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

Front

If two angles of one triangle are congruent to two angles of another triangle, what can be said about the triangles?

Back

The triangles are congruent.

Front

In an isosceles triangle, if one base angle measures 40°, what is the measure of the vertex angle?

Back

100°

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°.

Front

What is a remote interior angle?

Back

A remote interior angle is an interior angle of a triangle that is not adjacent to a given exterior angle.

Front

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

Back

In an isosceles triangle, the angles opposite the equal sides are congruent.

Front

If one angle of a triangle measures 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the formula for finding the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

What is a corresponding angle?

Back

Corresponding angles are angles that are in the same position on two different parallel lines cut by a transversal.