Geometry Concepts

4. lines that intersect at a right angle.
7. a plane figure with four equal straight sides and four right angles
10. a unit of measurement of angles
11. an angle that measures 180°
12. a round plane figure whose boundary consists of points equidistant from a fixed point
13. the point where two lines intersect
14. an angle that measures more than 90°
15. a straight one- dimensional figure that has no thickness and extends endlessly in both directions
16. an angle that measures exactly 90°
17. the space occupied by a flat shape or the surface of an object
20. the space between two intersecting lines

1. a triangle that has a right angle
2. a triangle that has two equal sides and one which is different
3. two lines in the same plane that are at equal distance from each other and never meet
5. when two or more lines cross and share a common point
6. a triangle that has an angle that measures more than 90°
8. a four-sided plane rectilinear figure with opposite sides, parallel
9. is the total length of the sides of a two-dimensional shape
18. an angle that measures less than 90°
19. a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides