Across
- 1. Non-empty intersection of a solid body in three-dimensional space with a plane
- 3. Set of all points that share a property
- 5. Segment that connects the midpoints of two sides of a triangle
- 7. The perimeter of a circle or ellipse
- 12. When two or more objects share the same center
- 14. Portion of a curve/circle
- 15. When several points share the same plane they are said to be...?
- 16. A transformation representing a flip of a figure
- 18. The perpendicular segment from a vertex of a triangle to the opposite side (or base)
- 19. Line that passes through two lines in the same plane at two distinct points
- 20. A polygon whose vertex angles are equal
Down
- 2. A polygon that is curved, rounded, or pointed outward
- 4. When two objects have the same shape and size they are...?
- 6. A pair of non-adjacent angles formed when two lines intersect
- 8. Straight line segment whose endpoints both lie on a circular arc
- 9. Type of triangle that has two sides of equal length
- 10. A quadrilateral that has four equal sides and four equal angles
- 11. 3 or more points are said to be ______ if they fall on the same line
- 13. 3 acute angles make an...?
- 17. Half of a circle is called a...?