Geometry

2. the point on a line segment that divides it into two equal parts
5. angles opposite angles made by two intersecting lines
7. equation that states two ratios are equal
10. a quadrilateral whose opposite sides are parallel and equal
11. consists of two points and the continuous part of a circle between them
13. the longest side of a right-angled triangle, the side opposite the right angle
14. line that intersects a circle at one point
15. a transformation that turns a figure about a fixed point at a given angle and direction
18. the distance around the edge of the circle

1. a ray that divides an angle into two congruent adjacent angles
3. a^2 + b^2 = c^2
4. divides a figure into two congruent halves that reflect each other
6. a similarity transformation that may change the size of an object, but not the shape
8. line that intersects a circle at two points
9. comparison of two numbers by division
12. a line that intersects two or more lines
16. a transformation that "slides" each point of a figure the same distance in the same direction
17. two lines that intersect to form right angles
18. a straight line that connects two points on the circumference of a circle
19. a straight line from the center to the perimeter of a circle