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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. - an angle between 0 – 90 degrees. Acute angle. Obtuse angle.

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Geometry l.jpg

Geometry

Review


Types of lines l.jpg
TYPES OF LINES

1. Parallel Lines

- Two lines that never intersect.

2. Perpendicular lines

- Two lines that intersect forming right angles.


Types of angles l.jpg
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.


Types of polygons l.jpg

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

Types of Polygons


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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.


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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.

Types of Quadrilaterals


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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.


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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

TRIANGLES

There are 180 degrees in a triangle !!!!


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