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Across 3. For two lines to be parallel, they must be ___. 7. Two angles that add up to 180 degrees are described as __. 9. I am the non-congruent side of an isosceles triangle 11. I divide a segment into to congruent parts 12. I am a triangle with two congruent sides 13. I am ___ to the angle near me when we share a common side and vertex 14. I am a straight arrangement of points with one endpoint 17. I divide an angle into two equal parts 18. I am an angle with exactly 90 degrees 19. The 3 anlges measures of a __ add up to 180 20. If two angles of one triangle are congruent then the third __ are also congruent 21. I am the pair of angles that are opposite of each other when two lines intersect

Down 1. If I am equiangular, then I am also this 2. I am opposite the right angle in a right triangle 4. ___ lines intersect and from right angles 5. I am an angle with less than 90 degrees 6. The ___ angle is between the two congruent sides of an isosceles triangle 8. A line is a straight arrangement of points with no ___ (plural). 10. Two supplementary adjacent angles are defined as a ___ pair 13. I am formed by two rays that share a common endpoint 15. I am an angle with a measure between 90 and 180 16. I am an angle with exactly 180 degrees