4th Math Vocabulary

5. two lines that intersect to form four right angles
7. an angle whose measure is 180 degrees
9. a triangle with one right angle
11. triangle with one obtuse angle
12. the measurement of the distance between two points
13. part of a line that includes two points called endpoints
14. that measures greater than 0 degrees and less than 90 degrees
17. a straight path of points that continues without end in both directions
19. and angle that measures 90 degrees and forms a square corner
20. in the direction from left to right
21. a part of a line that has one endpoint and continues without end in one direction

1. measures greater than 90 degrees and less than 180 degrees
2. lines lines that cross each other at exactly one point
3. an exact location in space
4. the unit used for measuring angles and temperature
6. lines that never intersect and are always the same distance apart
8. triangle with three acute angles
10. a shape formed by two line segments or rays that share the same endpoints
15. the point at either end of a line segment or the starting point of a ray
16. the point at which two rays of an angle meet
18. an imaginary line on a shape about which the shape can be folded so that its two parts match exactly