math crossword - Kevin Lee

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Across
  1. 3. surface
  2. 4. surface
  3. 6. the space occupied by a flat shape or the surface of an object. measured in square units such as square centimeters, square feet, square inches, etc.
  4. 7. solid
  5. 10. pyramid
  6. 13. a triangle that has two sides of equal length. Sometimes it is specified as having exactly two sides of equal length.
  7. 14. a part of a circle made of the arc of the circle along with its two radii. It is a portion of the circle formed by a portion of the circumference (arc) and radii of the circle at both endpoints of the arc.
  8. 15. volume
  9. 17. is the distance measured along a lateral face from the base to the apex along the "center" of the face. In other words, it is the altitude of the triangle comprising a lateral face.
  10. 18. a ___ of a circle or sphere is any of the line segments from its center to its perimeter. It is half of the circle.
  11. 20. a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides are equal in length.
Down
  1. 1. is a branch of mathematics that studies relationships between side lengths and angles of triangles. IT helps us find angles and distances, and is used a lot in science, engineering, video games, and more.
  2. 2. is a numerical measurement of how far apart objects or points are. may refer to a physical length or an estimation based on other criteria.
  3. 5. cylinder
  4. 8. angles that are opposite to each other when two lines cross. It is also known as vertical angles.
  5. 9. edge
  6. 11. is a connected subset of a differentiable curve. it is also called segments or rays, depending on whether they are bounded or not.
  7. 12. vertex
  8. 16. hem
  9. 19. is a transparent optical element with flat, polished surfaces that refract light. At least one surface must be angled.