4.1 to 4.3 Flashcard Review

Front

If ABCD is a parallelogram, what is the length of diagonal BD?

Back

The length of diagonal BD is 10.

Front

Find the measure of one exterior angle of a regular 18-gon.

Back

The measure of one exterior angle of a regular 18-gon is 20°.

Front

What is the sum of interior angles for a 27-gon?

Back

The sum of interior angles for a 27-gon is 4500°.

Front

Parallelograms are ...

Back

Parallelograms are quadrilaterals.

Front

Find the measure of angle b if b = 51 or b = 129.

Back

The measure of angle b is 129.

Front

What is the formula for the sum of interior angles of a polygon?

Back

The formula is (n-2) × 180°, where n is the number of sides.

Front

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

Back

The measure of an exterior angle is 360° divided by the number of sides (n).

Front

What is the definition of a parallelogram?

Back

A parallelogram is a quadrilateral with opposite sides that are parallel and equal in length.

Front

What is the relationship between the diagonals of a parallelogram?

Back

The diagonals of a parallelogram bisect each other.

Front

How many sides does a polygon have if the sum of its interior angles is 1080°?

Back

The polygon has 8 sides (an octagon).