math project #6

2. two lines that intersect at a right angle. is shown by an upsidedown T
5. an angle that is exactly 90 degrees
7. a triangle with only ONE obtuse angle
9. is a part of a line that begins at a particular point. it also extends forever in ONE direction.
14. a triangle that has a perfect 90-degree angle
15. a triangle that has all three sides equal in length. each angle will measure to 60 degrees
16. the figure formed by two rays, called the sides of the angle. it shares a common endpoint as the vertex of the angle
18. two angles that are next to each other. they must also have a common side and a common vertex
19. an angle with a measurement greater than 180 degrees but LESS than 360 degrees
20. a triangle where all but one side's length is the same

1. an angle that has a measurement that's less than 90 degrees
3. a triangle where all sides are different lengths
4. a triangle with THREE acute angles. the interior angles are never more than 90 degrees
6. two lines that will never meet. the two lines will always be the same distance apart
8. also known as SEGMENTS. they will always have the exact same length
10. a quadrilateral with at least ONE pair of sides that are parallel
11. a angle that is 180 degrees
12. an angle that has a measurement that is greater than 90 degrees
13. two sides that share a common vertex. they are also the non-hypotenuse side
17. a two-dimensional object that has NO endpoints. it also continues on forever in BOTH directions