Lessons 41-50 Vocab

4. the process of reasoning that begins with a true hypothesis and builds a logical argument to show that a conclusion is true.
6. in a proportion such that a/b = c/d, a and d are the extremes.
7. in a proportion, the product of the means and the product of the extremes.
8. having the same shape but not necessarily the same.
10. a comparison of two quantities by division.
11. the point of intersection of a circle or sphere with a tangent line or plane.
13. the arc formed by an inscribed angle.
14. an angle whose vertex is on a circle and whose sides contain chords of the circle.
15. a line that is in the same plane as a circle and intersects the circle at exactly one point.
17. a statement that two ratios are equal.
18. polygons whose corresponding angles are congruent and whose corresponding sides are proportional.
19. a segment whose endpoints lie on a circle.
20. a proof in which the statement to be proven is assumed to be false and a contradiction is shown.

1. a proof in which the statement to be proven is assumed to be false and a contradiction is shown.
2. in a proportion such that a/b = c/d, b and c are the means.
3. a statement that indicates that two polygons are similar by listing the vertices in the order of correspondence.
5. a line that intersects a circle at two points.
9. a style of proof that uses coordinate geometry and algebra.
12. the ratio of two corresponding linear measurements in a pair of similar figures.
16. the length of the perpendicular segment from the point to the line.