Geometry By: Mac

1. (of angles) having a common vertex and a common side.
4. an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
11. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
12. the sixteenth letter of the Greek alphabet ( Π, π ), transliterated as ‘p.’
13. either of two angles whose sum is 180°.
14. a general line
16. the distance around something.
17. an instrument for measuring the extent and characteristics of a person's field of vision.
19. either of two angles whose sum is 90°.
20. a measurable extent of some kind, such as length, breadth, depth, or height.

2. a statement that the values of two mathematical expressions are equal (indicated by the sign =).
3. a part of a line that is bounded by two distinct end points
5. a straight line from the center to the circumference of a circle or sphere.
6. An angle that measures less than ninety degrees but more than zero degrees.
7. each of the pairs of opposite angles made by two intersecting line
8. An angle that measures more than 90 degrees but less than 180 degrees.
9. A line meeting another at a right angle, or 90°
10. point where two lines meet or cross
15. the extent or measurement of a surface or piece of land.
18. the amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.