2. 1.Leg – One of 2 sides of a right triangle 2.Hypotenuse – the longest side of a right triangle 3.Triangle-a 3-sided polygon 4.Polygon-a 2-D figure, has at least 3 sides 5.Equilateral- all sides equal 6.Isosceles-2 sides are equal 7.Scalene-NO sides are equal 8.Pythagorean Theorem- a formula to find a side of a right triangle ( a^2 + b^2 = c^2 ) 9.Right Angle- a 90 degree angle 10.Right Triangle-a triangle with 2 legs, a hypotenuse, and a right angle

3. 11. Degrees- a measurement of an angle represented by a small circle 12. Radians- a measurement of an angle represented by a small hash mark (‘) 13. Side, Side, Side (SSS)- A method to prove that 2 or more triangles are congruent by having 3 congruent sides 14. Angle, Side, Angle (ASA)- A method to prove that 2 or more triangles are congruent by having an angle, a side, and an adjoining angle congruent 15. Angle, Angle, Angle (AAA)- A method to prove that 2 or more triangles are congruent by having 3 congruent angles 16. Congruent- equal 17. Similar- close, but not 100% congruent (usually a scale drawing) 18. Parallel- are two lines that never cross

4. 19. Perpendicular- are two lines that cross at a right angle 20. Straight Angle- a 180 degree line 21. Complementary- two angles that add to 90 degrees 22. Supplementary – two angles that add to 180 degrees 23. Perimeter – How much distance is around an object (Fence) (2-D) 24. Area – How much it takes to cover an object (Carpet) (2-D) 25. Volume – How much it takes to fill an object (3-D)