Geometry

1. describes the relationship between two lines, line segments, rays, or planes that intersect at a right angle, forming a 90-degree angle
3. two shapes are identical in size and shape
4. a quadrilateral with two pairs of parallel sides.
6. a closed, two-dimensional shape with six sides and six vertices (corners), forming six interior angles
13. a geometric transformation that slides a shape from one location to another without changing its size, shape, or orientation
16. a transformation that creates a mirror image of a shape across a line
17. two related geometric objects, such as angles or lines, that have a specific relationship or property when considered together
18. a transformation that changes the size of a figure, but not its shape
19. a three-sided polygon that consists of three edges and three vertices

2. created by swapping the hypothesis and conclusion of the original statement
3. simple closed shape formed by a set of points that are all equidistant from a central point called the center.
5. a transformation that turns a figure (or shape) around a fixed point, called the center of rotation
7. the shape formed by two rays (straight lines) that share a common endpoint called the vertex
8. a line segment drawn from a vertex of a triangle perpendicular to the opposite side, or the line containing that side
9. a location represented by a dot.
10. a flat surface that extends infinitely in two dimensions, with zero thickness
11. a portion of a line that has one fixed endpoint and extends infinitely in one direction
12. a one-dimensional figure, which has length but no width
14. a two-dimensional shape with four equal sides and four equal angles, all of which are right angles (90 degrees)
15. a straight line segment connecting two points on the circumference of a circle