This document defines and describes various geometric shapes and their properties. It discusses lines, angles, triangles, quadrilaterals, and circles. Key terms defined include points, line segments, rays, intersecting lines, perpendicular lines, acute angles, obtuse angles, right angles, vertices, complementary angles, supplementary angles, adjacent angles, and different types of triangles such as equilateral, isosceles, scalene, acute, obtuse, and right triangles. It also defines polygons, rectangles, and pentagons.

1. Geometry skills
Lines
Angles
Triangles
Quadrilaterals
Circles

2. Lines
● Points
● Line Segments
● Rays
● Lines
● Intersecting Lines
● Perpendicular Lines
● Skew Lines

3. Ray
● A line with a single endpoint.

4. Planes
● Planes is a flat surface and extends
with no end.

5. Points
● Point is a precise location in space. It
is labeled with a letter.

6. Intersecting line
● When two line intersect each other.
● Or when they cross each other.

7. Line Segments
● A line segment is a line with two end
points.

8. Perpendicular line
● A perpendicular line is two
intersecting lines that form a right
angle or a 90 degree angle.

9. Skew line
● Two lines that do not intersect but
they are parallel.

10. Angles
● Right Angles
● Acute
● Obtuse
● Vertex
● Complementary
● Supplementary
● Adjacent

11. Right Angle
● A right angle is an angle that is
always going to be a 90 degree
angle.

12. Acute
● An acute angel is an angle that is
always going to be less the 90.

13. Obtuse
● An obtuse angle is about 180
degrees angle.

14. Vertex
● A vertex is where two or more rays
meet.

15. Complementary
● Two angles which measure the sum
of 90 degrees.

16. Supplementary
● Two angles that measure 180
degrees.

17. Adjacent
● Angles that are side by side.

18. Triangles
● Equilateral triangle
● Isosceles triangle
● Scalene triangle
● Acute triangle
● Obtuse triangle
● Right triangle

19. Equilateral triangle
● A triangle with three congruent
sides.

20. Isosceles triangle
● A triangle with two congruent sides.
7in. 7in.
5in.

21. Scalene triangle
● A triangle with no congruent sides.

22. Acute triangle
● A acute triangle with all angle less
then 90 degrees.

23. Obtuse Triangle
● The measure that is 180 degrees.

24. Right Triangle
● A triangle with one right angle.

25. Quadrilateral
● Polygon
● Rectangle
● Pentagon

26. Polygon
● A closed plain figure with three or
more line segment.

27. Rectangle
● A rectangle is always four sided
figure.

28. Pentagon
● A pentagon is a figure that has five
sides.