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.