Geometry

Front

What are opposite angles in parallel lines?

Back

Opposite angles formed by two intersecting lines are equal. In parallel lines cut by a transversal, the opposite angles are also equal.

Front

What is a rectangle?

Back

A rectangle is a quadrilateral with four right angles. Its opposite sides are equal in length.

Front

What is a rhombus?

Back

A rhombus is a quadrilateral with all four sides of equal length. Its opposite angles are equal, and its diagonals bisect each other at right angles.

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 an exterior angle of a triangle?

Back

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

Front

What is the relationship between adjacent angles on a straight line?

Back

Adjacent angles on a straight line sum up to 180°.

Front

What is the property of diagonals in a rectangle?

Back

In a rectangle, the diagonals are equal in length and bisect each other.

Front

What is the property of diagonals in a rhombus?

Back

In a rhombus, the diagonals bisect each other at right angles and are not necessarily equal.

Front

If two angles are supplementary, what is their sum?

Back

The sum of two supplementary angles is 180°.

Front

What is the formula to 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 opposite interior angles.