1. Geometry
Review

2. TYPES OF LINES 1. Parallel Lines - Two lines that never intersect.
2. Perpendicular lines
- Two lines that intersect forming right angles.

3. Types of Angles Right angle - an angle with 90 degrees
- an angle between 0 – 90 degrees
Acute angle
Obtuse angle
- an angle between 90 – 180 degrees
Straight angle
- an angle with 180 degrees in it.

4. Types of Polygons Triangles Quadrilateral Pentagon Hexagon Heptagon
Octagon
Nonagon
Decagon
Undecagon
Dodecagon
N- gon
Has three sides
Has four sides
Has five sides
Has six sides
Has seven sides
Has eight sides
Has nine sides
Has ten sides
Has eleven sides
Has twelve sides
Has N- sides

5. Polygons
Polygons are simple, closed, planar geometric figure whose sides are line segments.
The number of sides is the same as the number of angles.
Concave polygon have an indentation.
Convex polygons have no indentation.

6. Types of Quadrilaterals
Has one set of parallel sides.
Has two sets of parallel sides
A parallelogram with all equal sides
A parallelogram with all right angles
A Rectangle with all equal sides.
Trapezoid
Parallelogram
Rhombus
Rectangle
Square

7. Regular Polygons
A regular polygon has all equal sides and all equal angles.
A square is an example of a regular quadrilateral.
Here are some other examples.

8. TRIANGLES There are 180 degrees in a triangle !!!! Right Equilateral
In regards to ANGLES
Right
-Has 1 right angle
Obtuse
-Has 1 obtuse angle
Acute
-Has all acute angles
Equiangular – has all angles the same measure.
In regards to SIDES
Equilateral
- all equal sides
Isosceles
- 2 equal sides
Scalene
No equal sides
There are 180 degrees in a triangle !!!!