Angles & Triangles

4. angles two angles whose measures add up to 90 degrees.
8. lines are lines that intersect at a right angle (90 degrees).
12. Theorem sum of two sides of a triangle must be greater than the third side. This tells us if a triangle can be formed.
14. a polygon with three sides and three angles. The sum of the interior angles equals 180 degrees.
15. triangles are when all sides are different lengths and all angles of different measures.

1. triangle that has at least two sides of equal length.
2. angle is an angle that measures greater than 90 degrees but less than 180 degrees.
3. lines on a plane that never meet. They are also the same distance from each other.
5. angles two angles whose measures add up to 180 degrees.
6. is a triangle where ALL three sides are of equal length, and ALL three interior angles measure the same.
7. angles that are "opposite" or “across or diagonal” from each other.
9. angles share a common side and a common vertex but do not overlap. They are “side by side”.
10. angle an angle that measures less than 90 degrees.
11. are formed by two rays that share a vertex. Angles are measured in degrees.
13. angle is an angle that measures exactly 90 degrees.