Geometry Crossword Puzzle

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Across
  1. 2. This is a quadrilateral having only one pair of parallel sides. To find the area of it, the formula A=1/2(B1+B2)h.
  2. 5. This is an angle whose vertex is on the circle and sides contain chords. The measure of the inscribed angle is equivalent to half the intercepted arc.
  3. 7. These are angles that match each other in position. These angles are congruent.
  4. 9. This is a polyhedron in which the base is a polygon and the lateral faces are triangles with a common vertex. It has three main parts: the base, apex, and faces.
  5. 10. These are angles that add up to 180 degrees. 50 degrees and 130 degrees are an example of this.
  6. 12. This is a straight line that intersects a circle. It intersects at two points.
  7. 14. This is the perpendicular distance from the center of a regular polygon to a side. It is required to find the area of a regular polygon.
  8. 16. This is a straight line that touches a circle at only one point. This never enters the circle's interior.
  9. 17. This is a line that intersects two or more coplanar lines at distinct points. These can be used to help determine if two lines are parallel.
  10. 19. These are angles that add up to make 90 degrees. 60 degrees and 20 degrees are an example of this.
  11. 20. Name a shape with 5 sizes. Each interior angle should be 36 degrees.
Down
  1. 1. This is an angle whose vertex is the center of the circle. To find the measure, you need to divide the arc length by the radius length.
  2. 3. This is the distance around a circle. The formula is C=2πr.
  3. 4. This is when the points in the original figure move an identical distance along parallel lines, creating the image. The image and preimage will be congruent.
  4. 6. This is the amount of space that a 3-D figure occupies. The most basic formula for this is V=Bh.
  5. 8. These are angles that lie on the outside of two lines. They are also on opposite sides of the transversal.
  6. 10. This is the set of all points in space that is given to distance from a point. This shape has no corners or edges.
  7. 11. These are coplanar lines that do not intersect. They are always the same distance apart.
  8. 13. These are angles that are between the two lines and are on the same side of the transversal. They are supplementary.
  9. 15. Name a shape with 6 sizes. Each interior angle should be 60.
  10. 18. This is the distance along an arc. The formula is s=rθ.