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Blake's presentation

by MICDS on May 11, 2010

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Blake's presentationPresentation Transcript

• Geometry
By Blake Abel
This is what I’ve learned so far.
I hope you like it!!
• Line Segments
A line segment is a fraction of a line. It only goes from one end point to the other.
• Rays
A ray is simply discribed as a half-line, because it goes forever in ONLY ONE DIRECTION.
• Lines
Lines move forever in two directions. Example-like right and left or north and south.
• Polygons
Polygons cannot have
curved line segments
Intersecting line segments
And must have three or more sides
• Parallel lines
Parallel lines are lines that NEVER meet.
Like the lines below.
• Perpendicular lines
Perpendicular lines are lines that meet at Right Angles.
• Concave Polygons
Concave Polygons are polygons with at least one side ‘Pushed In’.
• Convex Polygons
Convex Polygons are polygons with at least one side ‘Pushed Out’.
• How to measure Angles
You use a protractor to measure angles by lining up the hole with the vertex and measuring. I’ve marked Right Angles.
• Acute Angles
Acute angles are smaller than 90°.
I’ve made one below.
• Right Angles
Right Angles are angles you can fit paper into. They are 90° angles. I’ve made one below.
• Obtuse Angles
Obtuse angles are bigger than 90°. But smaller than 180°. I’ve made one below.
• Reflex Angles
Reflex angles are angels that are bigger than 180°. I’ve made one below.