lesson 41-50

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Across
  1. 3. angle-and angles whose vertex is on a circle and whose sides contain chords of the circle
  2. 5. of a proportion-in a proportion such as a/b= c/d b and c are the means
  3. 7. prism with six square faces
  4. 8. a three dimensional figure with a circular base and a curved lateral surface that connects the base to a point called the vertex
  5. 10. a diagram of the faces of a three dimensional figure arranged in such a way that the diagram can be folded to form the three dimensional figure
  6. 12. mean- for positive numbers a and b the positive number x such that a/x = x/b
  7. 14. reasoning-the process of reasoning that begins with a true hypothesis and builds a logical argument to show that a conclusion is true
  8. 15. products-in a proportion the product of the mean and the product of the extremes
  9. 16. segment whose endpoints lie on a circle
  10. 19. proof-a proof in which the statement to be proven is false and a contradiction is shown
  11. 20. proof-a style of proof that uses coordinate geometry and algebra
Down
  1. 1. of a prism-one of the two parallel faces of a prism
  2. 2. of tangency- the point of intersection of a circle or sphere with a tangent line or plane
  3. 4. three dimensional figure with two parallel congruent circular bases and a curved lateral surface that connects the base
  4. 6. of a polyhedron- a flat surface of a polyhedron
  5. 9. of a three dimensional figure- a segment that is the intersection of two faces of a figure
  6. 11. of proportion- in a proportion such as a/b =c/d, a and d are the extremes
  7. 13. arc-the arc formed by an inscribed angle
  8. 17. from point to a line- the length of a perpendicular segment from the point to the line
  9. 18. of a polyhedron- a segment whose endpoint are vertices of two different faces of a polyhedron