Ava's Geometry Crossword Puzzle

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Across
  1. 2. A subset of geometry dealing with the properties of a triangle. It deals with sine (sin), cosine (cos), and tangent (tan).
  2. 3. It is a four sided figure. A rectangle or a square would be called this.
  3. 8. The perimeter of a circle. The equation for this is 2πr.
  4. 10. A line segment extending from the center of a circle or sphere to the circumference or bounding surface. It is half the amount of the diameter.
  5. 11. A point where two rays meet. A rectangle has four of these.
  6. 14. A triangle with one 90° internal angle. Has two legs and a hypotenuse.
  7. 15. The line segment between two points on a given curve. Can be found in a circle.
  8. 17. A polygon with 5 sides and 5 angles. The sum of the interior angles is 540°.
  9. 18. Two circle ends that is connected by a curved face that looks like a tube. The volume of three cones equals the volume of this shape.
  10. 19. A straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end. It is double the amount of the radius.
  11. 20. A geometrical object that is a three-dimensional analogue to a two-dimensional circle. The equation for the volume of the shape is 4πr.
Down
  1. 1. When the sum of two angles is equal to 180°. If angle A is added to angle B than they would equal 180°.
  2. 4. An angle less than 90°. For example, an angle of 30° would be called this.
  3. 5. A triangle that has two equal sides and two equal angles.The name derives from the Greek iso (same) and skelos (leg).
  4. 6. An angle greater than 90°. For example, an angle of 120° would be called this.
  5. 7. When the sum of two angles is equal to 90°. If angle A is added to angle B than they would equal 90°.
  6. 9. The figures are have an identical form. The symbol used to represent it is ≅.
  7. 12. A prism in which the joining edges and faces are perpendicular to the base faces. The surface area is SA=ph+2B.
  8. 13. It has one base of a polygon and the sides are all triangles. You need to know the slant height for this shape.
  9. 16. A branch of mathematics that studies the sizes, shapes, positions angles, and dimensions of things. You learn this in high school.