Across
- 3. a line, ray, or line segment that intersects a segment and is perpendicular to the segment at its midpoint
- 5. a pair of angles that have the same relative position in two congruent or similar figures
- 8. an angle formed by a side of a figure and an extension of an adjacent side
- 10. the point at which three or more lines, rays, or line segments intersect
- 11. to accept as true without proof
- 12. in a plane, a transformation in which each point on a figure is turned through a given angle and direction around a given point called the center of rotation
- 16. the center of a circle inscribed in a polygon; in a triangle, the point of concurrency of the angle bisectors of the triangle
- 17. a pair of sides that have the same relative position in two congruent or similar figures
- 18. the center of a circle circumscribed about a polygon; in a triangle, the point of concurrency of the perpendicular bisectors of the sides of the triangle
- 23. in an isosceles triangle, the angle formed where the two congruent sides meet
- 25. a segment from one vertex of a triangle to the midpoint of the opposite side
- 27. each of the two nonadjacent interior angles corresponding to each exterior angle of a triangle
- 28. two angles whose measures have a sum of 180 degrees
- 30. a point on a line segment that is equidistant from the two endpoints
- 31. the side of a right triangle that is opposite the right angle and is always the longest side of the triangle
- 32. in a right triangle, either of the two sides forming the right angle
- 33. to divide into two congruent parts
- 34. a triangle whose three angles each measure less than 90 degrees
- 35. the point of concurrency of the three medians of a triangle
- 36. a triangle with three sides of different lengths
- 37. transformation that preserves the size, length, shape, lines, and angle measures of the figure
- 38. a triangle in which one angle measures greater than 90 degrees
Down
- 1. in a plane, a transformation such that relative to a given line of reflection, a point on the preimage and the corresponding point on the image can be connected by a segment for which the line of reflection is the perpendicular bisector
- 2. to defend; to show to be correct
- 4. a triangle having at least two congruent sides
- 6. a triangle in which one angle measures 90 degrees
- 7. a statement formed by switching the hypothesis and the conclusion of a conditional
- 9. in a triangle, the angle formed by two given sides of the triangle
- 13. a ray, line, or line segment that divides an angle into two congruent angles
- 14. the angles formed by each pair of adjacent sides on the inside of a polygon
- 15. a side between two given angles of a triangle
- 19. a rigid transformation that moves every point of the preimage of an object the same distance and direction to create the image
- 20. the point of concurrency of the three lines containing the altitude of a triangle
- 21. two line segments that have the same length
- 22. an algebraic sentence stating a relationship between two quantities other than that they are equal to each other
- 24. a triangle having three congruent sides
- 26. two or more figures with the same sides and angles
- 29. in a triangle, a perpendicular segment from a vertex to the opposite side or to the line containing the opposite side