Properties of Quadrilaterals Flashcards
How do you find the measure of one central angle?
360/n
What is the measure of one interior angle
(n-2)180/n
Total Sum of Interior Angles
(n-2) 180
The Measure of 1 exterior angle
120- (n-2)180/n
Total Exterior Angles
360
Amt. of Diagonals
n(n-3)/2
What are the properties of Parallelograms
A quadrilateral
with two pairs of parallel sides
1.. Opposite sides are congruent
2. Opposite Angles are congruent
3. Consecutive Angles are
supplementary
4. Diagonals bisect each other
Properties of Rhombus
A parallelogram
where all sides are equal
- Has four congruent sides
2.Diagonals are perpendicular
3.Consecutive Angles are
supplementary - Diagonals Bisect each other
Plus Properties of Paralleograms
Properties of A Square
A Parallelogram with
four congruent sides and four
congruent angles
- Opposite sides are congruent
- Opposite Angles are congruent
- Consecutive Angles are
supplementary - Diagonals bisect each other
Properties of a Rectangle
A quadrilateral that
has four right angles
Properties of A Trapezoid
A quadrilateral with
exactly one pair of parallel sides
(bases). It has two pairs of base
angles( formed with legs) and
two non parallel legs
Isosceles Trapezoids
1. Each pair of base angles is
congruent
2. The legs are congruent
3. Diagonals are congruent
4. ( For Trapezoids )The mid-
segment is parallel to each base
and its length is 1⁄2 the sum of the
lengths of the bases
Properties of a Trapezoidl
A quadrilateral that has two
pairs of consecutive congruent
sides ( opposite sides are not
congruent)