Geometry Crossword

4. Line extending from the center of a circle to the edge. To the circumference of a circle or sphere.
8. Two lines segments that cross to form a 90 degree angle. Lines that intersect.
10. A triangle with one angle equaling 90 degrees. 45-45-90, or 30-60-90.
13. Polygon with four sides. Rectangle, square, trapezoid, etc.
14. 3D square. 6 equilateral sides as faces.
15. When two lines meet. When two lines make a corner.
17. All sides unequal. All angles unequal.
18. Intersection point. Each angular point.
19. Flat two-dimensional surface. The face of a three-dimensional object as it creates a surface, the dimensions of which are infinite.
20. Lines that cross each other. Can include two or more lines.

1. Closed figure. 6 sides.
2. Opposite sides are congruent and parallel to each other. Same with opposite angles.
3. Line segment between two points on a circle. Straight lines joining ends of arcs.
5. Less than 90 degrees. More than 0 degrees.
6. Straight line passing through the center of a circle. Double the radius.
7. All sides equal. All angles equal.
9. A specific position. On a line, plane, or in space.
11. Less than 180 degrees. More than 90 degrees.
12. Front side. Surface planes of 3D shapes.
16. Continuing extent of length. Straight or curved.