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