GeometryReview

TYPES OF LINES1. Parallel Lines - Two lines that never

intersect.

2. Perpendicular lines - Two lines that intersect forming right angles.

Types of Angles

Right angle

Acute angle

Obtuse angle

Straight angle

- an angle with 90 degrees

- an angle between 0 – 90 degrees

- an angle between 90 – 180 degrees

- an angle with 180 degrees in it.

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

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.

Types of Quadrilaterals

• Trapezoid

• Parallelogram

• Rhombus

• Rectangle

• Square

• 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.

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.

TRIANGLESIn 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 !!!!