Transcript Document

Geometry
Review
TYPES OF LINES
1. Parallel Lines - Two lines that never
intersect.
2. Perpendicular lines - Two lines that intersect
forming right angles.
Types of Angles
Right angle - an angle with 90 degrees
Acute angle - an angle between 0 – 90 degrees
Obtuse angle - an angle between 90 – 180 degrees
Straight angle - an angle with 180 degrees in it.
Types of Polygons
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Triangles
Quadrilateral
Pentagon
Hexagon
Heptagon
Octagon
Nonagon
Decagon
Undecagon
Dodecagon
N- gon
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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
• Has one set of parallel
sides.
• Parallelogram • Has two sets of parallel
• Rhombus
• Rectangle
• Square
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.
TRIANGLES
In regards to ANGLES
• Right
-Has 1 right angle
• Obtuse
-Has 1 obtuse angle
• Acute
-Has all acute angles
• Equiangular – has all
In regards to SIDES
• Equilateral
- all equal sides
• Isosceles
- 2 equal sides
• Scalene
– No equal sides
angles the same measure.
There are 180 degrees in a triangle !!!!