exam2 Flashcards
(9 cards)
1
Q
how to find exterior angle of a polygon
A
360 divided by the number of sides
2
Q
charcteristics of parallelograms
A
opposite sides and angles are congruent
1 right angle makes all other angles 90
the consecutive angles on the sides are supplementary
3
Q
characteristic of rectangle
A
diagnols are congruent
4
Q
characteristics of rhombi
A
diagnols for right angles
the diagnols bisect oposite angles
5
Q
how to perform dilation
A
multiply x and y by scale factor
6
Q
law of sines
A
A/sin a= B/sin b= C/sin c
(not for right triangles)
7
Q
circumference
A
c=2 Pi r
8
Q
central angle
A
central angles are = to the arc in front of them
9
Q
inscribed angles
A
inscribed angles are half of the arc across from it
