Geometry Prerequisites

1. Two angles whose sum of their measures is 180 degrees.
3. A parallelogram with four congruent sides and four right angles.
5. A quadrilateral with exactly one pair of parallel sides, the bases. The nonparallel sides are called the legs of the trapezoid. Each pair of angles adjacent to a base are base angles of the trapezoid.
7. The total space taken up by a flat 2-D shape.
9. A parallelogram with four congruent sides.
13. A triangle in which all 3 sides are a different length.
14. A triangle that has 1 angle measuring 90˚.
15. For any right triangle with sides a and b and hypotenuse c, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
16. A quadrilateral with two pairs of parallel sides.
19. The distance around the outside of a circle.
20. A triangle in which 2 sides are the same length.

2. Two lines that lie in the same plane and do not intersect.
4. A quadrilateral in which there are 2 distinct sets of consecutive, congruent sides.
6. A triangle in which all 3 sides are the same length.
8. A parallelogram with four right angles.
10. Two angles whose sum of their measures is 90 degrees.
11. The total space taken up by a 3-D object
12. Two lines that intersect and form right angles.
17. A triangle in which all 3 angles are less than 90˚.
18. A triangle that has 1 angle measuring more than 90˚.