Geometry Vocab

4. line through the focus perpendicular to directrix
5. longest arc more than 180
8. the downward angle formed by a observer’s horizontal line and their direction line of vision to an object below
9. set of numbers a, b, and c, that follow a^2+b^2=c^2
10. reduction or enlargement through scale factor and vertex
11. if two sides and included angle are proportional, then the triangles are similar
13. quadrilateral with pairs of opposite sides and 4 right angles
14. opposite/adjacent
18. segment from the center of a regular polygon to the side of a polygon
19. 1/360 of rotation
20. distance of arc across endpoints
22. segment with endpoints at the center and any point the circle
26. square root of the product of two numbers
27. a quadrilateral with two different pairs of adjacent, equal-length sides
28. opposite/hypotenuse
29. quadrilateral with pairs of opposite sides
30. Shape with all points in being plane equidistant from the center
32. a^2=b^2+c^2-2bcCosA…
34. if all the side lengths of two triangles are proportional to the other, then the triangles are similar
35. an angle containing a vertex and chords in circle
37. a ratio of 2 sides in a right triangle
39. chord that passes through the center and is 2 radii
40. segment that connects midpoints of the non parallel sides of the trapezoid

1. shortest arc less than 180
2. fixed internal point in parabola that helps determine the curve of the parabola
3. angle with vertex in the center of circle with the 2 radii
6. ratio of arc length to radius of circle
7. endpoints are diameter, exactly 180
12. the upward angle formed between an observer's horizontal line of sight and their direct line of vision to an object above
15. when circle contains all vertex of polygon
16. a quadrilateral with one pair of parallel sides
17. segment with endpoints on the circle
21. fixed line in a parabola that has the same distance from the vertex as the focus
23. smooth, continuous portion of the circumference of a circle or the boundary of any curved shape, made by two end points and central angle
24. if 2 angles of one triangle are congruent to the other, then the triangles are similar
25. a^2+b^2=c^2
31. adjacent/hypotenuse
33. circumference/diameter
34. a line that intersects a circle in two points
36. a set of points that are the same distance from a fixed point
38. when each vertex of a polygon lies on the circle