Geometry Vocabulary

1. triangle a triangle with one obtuse angle
4. angle an angle with a measure less than 90 degrees
6. triangle a triangle with a right angle (90 degrees)
9. triangle a triangle with two sides equal in length
13. angle an angle with a measure greater than 180 degrees but less than 360 degrees
14. angle a 90 degree angle
16. part of a line connecting two points, it has definite endpoints
17. the figure formed by two rays, called the sides of an angle, sharing a common endpoint (the vertex of the angle)
18. triangle a triangle with three acute angles
19. a two- dimensional object that has no endpoints and continues on forever in both directions

1. angle an angle with a measure more than 90 degrees
2. triangle a triangle with all three sides equal in length, each angle of an equilateral triangle measures 60 degrees
3. a part of a line that begins at a particular point( the endpoint) and extends forever in one direction
5. lines lines that never meet; two parallel lines are always the same distance apart
7. the point at which the rays of an angle or the sides of a polygon meet; the plural form of the word is ¨vertexes¨ or ¨vertices¨
8. a quadrilateral with two pairs of parallel sides; opposite sides have the same length and opposite angles have the same measure; all rectangles are parallelograms are rectangles because parallelograms do not necessarily have the right angles
10. angle a 180 degree angle
11. triangle a triangle with no sides equal in length
12. a figure with four sides and four right angles; opposite sides are parallel and congruent, a rectangle is sometimes a trapezoid; a rectangle is sometimes a square
15. angle two angles that are next to each other