Ava's Geometry Crossword Puzzle

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Across
  1. 2. A triangle with one 90° internal angle. Has two legs and a hypotenuse.
  2. 4. A subset of geometry dealing with the properties of a triangle. It deals with sine (sin), cosine (cos), and tangent (tan).
  3. 5. 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.
  4. 9. An angle greater than 90°. For example, an angle of 120° would be called this.
  5. 13. It is a four sided figure. A rectangle or a square would be called this.
  6. 14. A polygon with 5 sides and 5 angles. The sum of the interior angles is 540°.
Down
  1. 1. A prism in which the joining edges and faces are perpendicular to the base faces. The surface area is SA=ph+2B.
  2. 3. A branch of mathematics that studies the sizes, shapes, positions angles, and dimensions of things. You learn this in high school.
  3. 6. When the sum of two angles is equal to 180°. If angle A is added to angle B than they would equal 180°.
  4. 7. 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.
  5. 8. A triangle that has two equal sides and two equal angles.The name derives from the Greek iso (same) and skelos (leg).
  6. 10. When the sum of two angles is equal to 90°. If angle A is added to angle B than they would equal 90°.
  7. 11. The line segment between two points on a given curve. Can be found in a circle.
  8. 12. An angle less than 90°. For example, an angle of 30° would be called this.