Definitions
This is our word for a nine-sided polygon.
What is a nonagon?
Opposite __________ and opposite __________ of a parallelogram are congruent.
What are sides and angles?
This is the formula for the sum of the interior angles of a polygon.
What is (n-2)180?
This is a quadrilateral with exactly one pair of parallel sides.
What is a trapezoid?
This is the formula to find the median of a trapezoid.
Median = (base1+base2)/2
This is a four sided polygon that has both pairs of opposite sides as parallel.
What is a parallelogram?
_____________ of a parallelogram add up to 180°.
What are consecutive angles?
This is the formula to find the sum of the exterior angles of a polygon.
What is 360°=exterior angle sum?
This is a quadrilateral with exactly one pair of parallel sides and congruent legs.
What is an isosceles trapezoid?
If a quadrilateral is a kite, then the diagonals are _________________.
This is a parallelogram with 4 rights angles and 4 congruent sides.
What is a square?
What is "bisect each other"?
This is the formula to find one interior angle of a regular polygon.
What is (n-2)180/n ?
This is the segment that joins the midpoints of the legs of the trapezoid.
What is the median?
If one base of a trapezoid is 40 inches and the other base is 20 inches, what is the length of the median?
30 inches
This is a parallelogram with 4 congruent sides, but the angles are not right.
What is a rhombus?
In addition to being a parallelogram, rectangles have these two other properties.
1. 4 right angles
2. diagonals are congruent
This is the formula to find one exterior angle of a regular polygon.
What is 360/n ?
This is a quadrilateral with two pairs of consecutive sides congruent and no opposite sides congruent.
What is a kite?
What is the length of the diagonals of a rectangle ABCD when diagonal AC = 3x+1 and BD = 5x-7?
AC=BD=13
This is a parallelogram with 4 congruent angles, but the 4 sides are not congruent.
What is a rectangle?
In addition to being a parallelogram, rhombi have these three additional properties.
1. Diagonals are perpendicular
2. Diagonals bisect opposite angles
3. All 4 sides are congruent
This formula gives you an exterior angle when given an interior angle.
180 - interior angle = exterior angle
In this polygon, a line can be drawn from one corner to another in such as way that the line is never outside the polygon.
What is a convex polygon?
The ___________, _____________, and _________, of an isosceles trapezoid are congruent.
What are diagonals, base angles, and legs?