Interior and Exterior angle rules
1. Exterior angles, regardless of # of angles, always
sum to 360
2. Interior angles sum = (n-2)*180 where n=# of sides
Interior and Exterior angle rules
1. Exterior angles, regardless of # of angles, always
sum to 360
2. Interior angles sum = (n-2)*180 where n=# of sides
Parallelogram rules
1. Opposite side are equal
2. Opposite angles are equal
3. Adjacent angles add to 180
4. Diagonals bisect each other
Presume this is a rhombus
1. All sides are equal
2. Opposite angles are equal
3. Diagonals bisect at right angles
4. Diagonals are angle bisectors
Are all four sides
equal?
Yes
Are the slopes of
adjacent sides
perpendicular?
Yes
It is a square
Are the slopes of
adjacent sides
perpendicular?
No
It is a rhombus
No
Yes – it is a
rectangle