DAY 123 - Angles in Quadrilaterals

Front

What is a quadrilateral?

Back

A quadrilateral is a polygon with four sides and four angles.

Front

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

Back

The sum of the interior angles of a quadrilateral is 360 degrees.

Front

If one angle of a quadrilateral is 90 degrees, what is the maximum possible size of the other three angles?

Back

The maximum possible size of the other three angles is 270 degrees.

Front

What is an interior angle?

Back

An interior angle is an angle formed between two sides of a polygon that is inside the polygon.

Front

What is an exterior angle?

Back

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

Front

How do you calculate the measure of an exterior angle of a quadrilateral?

Back

The measure of an exterior angle of a quadrilateral is equal to the sum of the two opposite interior angles.

Front

Can a quadrilateral have an angle greater than 180 degrees?

Back

Yes, a quadrilateral can have an angle greater than 180 degrees, but the sum of all angles must still equal 360 degrees.

Front

What is a convex quadrilateral?

Back

A convex quadrilateral is a quadrilateral where all interior angles are less than 180 degrees.

Front

What is a concave quadrilateral?

Back

A concave quadrilateral is a quadrilateral that has at least one interior angle greater than 180 degrees.

Front

If three angles of a quadrilateral are 90 degrees, 80 degrees, and 70 degrees, what is the fourth angle?

Back

The fourth angle is 120 degrees.