geometry

2. A six-sided polygon.
5. A four-sided polygon.
7. Two geometric objects having the same measure.
9. An angle that measures less than 90°
11. Two lines that intersect to form four right angles
12. Triangle A triangle that has one obtuse angle
15. An eight-sided polygon.
16. A series of connected line segments that starts and ends at the same place and does not intersect itself anywhere in between.
18. An angle that measures 90°
19. the intersection point of two sides of a plane figure
20. Distance around a circle (the perimeter)
21. A straight one-dimensional figure having no thickness and extending infinitely in both directions.

1. A segment that connects two nonadjacent vertices of a polygon.
3. Lines in a plane that never intersect
4. All its angles=180
6. a triangle with all sides equal and all angles equal
8. A line segment with one endpoint at the center of a circle and the other endpoint on the circle
10. A figure formed by two line segments or rays with a common endpoint.
11. A location in space – a dot on a piece of paper
13. Lines that cross at exactly one point
14. The distance around a figure.
17. A rectangle with 4 equal sides