This document discusses different geometric shapes and concepts. It defines line segments, rays, and lines. It also defines polygons and notes their properties. Additionally, it explains parallel and perpendicular lines. The document describes concave and convex polygons and how to measure angles. It provides examples of acute, right, obtuse, and reflex angles.

1. Geometry By Blake Abel This is what I’ve learned so far. I hope you like it!!

2. Line Segments A line segment is a fraction of a line. It only goes from one end point to the other.

3. Rays A ray is simply discribed as a half-line, because it goes forever in ONLY ONE DIRECTION.

4. Lines Lines move forever in two directions. Example-like right and left or north and south.

5. Polygons Polygons cannot have curved line segments Intersecting line segments And must have three or more sides

6. Parallel lines Parallel lines are lines that NEVER meet. Like the lines below.

7. Perpendicular lines Perpendicular lines are lines that meet at Right Angles.

8. Concave Polygons Concave Polygons are polygons with at least one side ‘Pushed In’.

9. Convex Polygons Convex Polygons are polygons with at least one side ‘Pushed Out’.

10. 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.

11. Acute Angles Acute angles are smaller than 90°. I’ve made one below.

12. Right Angles Right Angles are angles you can fit paper into. They are 90° angles. I’ve made one below.

13. Obtuse Angles Obtuse angles are bigger than 90°. But smaller than 180°. I’ve made one below.

14. Reflex Angles Reflex angles are angels that are bigger than 180°. I’ve made one below.