interior angles
what is the formula to find the sum of interior angles of a polygon?
(n-2)180
What is the sum of exterior angles of ANY polygon?
360 degrees
What are the properties of a parallelogram?
opposite sides are parallel
opposite sides are congruent
opposite angles are congruent
consecutive angles are supplementary (add to 180)
diagonals bisect eachother
what type of quadrilateral do the 4 coordinates below create?
A (-5,-2) B(3,-2) C(1,-6) D(-7,-6)
parallelogram
How old is Ms. Duim?
25
what is the sum of interior angles of a 13 sided polygon?
1980 degrees
what is the sum of exterior angles of a 9 sided polygon?
360 degrees
what are the properties of a rectangle?
all angles are 90 degrees
diagonals are congruent
all parallelogram properties
find the distance of all 4 sides of the parallelogram made from the coordinates:
W(-3,7) X(3,3) Y(1,-3) Z(-5,1)
WX=ZY= sqrt(52)
WZ=XY= sqrt(40)
consecutive angles of a parallelogram are:
3x+1 and 2x-6, solve for x
37 degrees
what is the angles measure of each interior angle of a regular octagon (8 sides)
135 degrees
what is the measure of each exterior angles of a regular 12 sided polygon?
30 degrees
what are the properties of a rhombus
all sides are congruent
diagonals are perpendicular
diagonals bisect angles
all parallelogram properties
What comes after proving you have 2 congruent triangles?
CPCTC
I have 4 congruent sides, what type of quadrilateral am I?
Rhombus
the angles measures of a 7 sided shape are:
145 degrees, 130 degrees, 2x, 75 degrees, x, 170 degrees, 95 degrees
Solve for x
x = 95 degrees
the measures of exterior angles of a 5 sided shape are:
120 degrees, 0.5 x, 85 degrees, 95 degrees, 2.5 x
Solve for x
80 degrees
is a rhombus always, sometimes or never a square?
sometimes
What are the 4 ways to prove triangles are congruent?
SSS
SAS
ASA
AAS
My diagonals are congruent, what type of quadrilateral am I?
Rectangle
What is the measure of each interior angles of a regular 15 sided polygon?
156 degrees
What is the measure of each exterior angle of a regular 20 sided polygon?
18 degrees
what is the formula to find the mid-segment of a trapezoid?
mid-segment = (base 1 + base 2)/2
Do the points (2,4), (8,4), (8,-3) and (2,-3) create a parallelogram?
yes!
My opposite sides are parallel and my diagonals bisect each other, what type of quadrilateral am I?
parallelogram