algebra

posted by .

the circle to the right has 21 points. All possible line segments have been drawn. How many line segments are there?

  • algebra -

    Another way to ask the question,
    "in how many ways can I choose any 2 of the 21 points" ?

    C(21,2) = 210

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Segments in a Circle

    If PT = 5.3, TU = 3.8, and UV = 6.4. Solve for the measure of VS and round to the nearest hundredth. What is PT, TU etc Are they length of line segments?
  2. geometry

    We are learning about proofs. We drew lines between noncollinear points. Our table showed 2 points >> 1 line segment, 3 point >> 3 line segments, 4 points >> 6 line segments, 5 points >> 10 line seg, 6 points …
  3. geometry

    Trisha drew a pair of line segments starting from a vertex. Which of these statements best compares the pair of line segments with the vertex?
  4. Math Geometry

    A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are (8) (2) =28 such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been …
  5. math

    A cube has 8 vertices. For each pair of distinct vertices, we connect them up with a line segment. There are (8 2 )=28 such line segments. For each of these 28 line segments, we mark the midpoint. How many distinct points have been …
  6. maths

    A point P is uniformly chosen inside a regular hexagon of side length 3. For each side of the hexagon a line is drawn from P to the point on that side which is closest to P. The probability that the sum of the lengths of these segments …
  7. Math

    We are learning about proofs. We drew lines between noncollinear points. Our table showed 2 points >> 1 line segment, 3 point >> 3 line segments, 4 points >> 6 line segments, 5 points >> 10 line seg, 6 points …
  8. math

    X1, X2,...,X9 are nine points on the circumference of circle O. Line segments are drawn connecting each pair of points. What is the largest number of different points inside the circle at which at least two of these line segments intersect?
  9. Math

    Draw four non_collinear points on a paper and draw all possible line segments. How many line segments can be drawn.
  10. Algebra

    The five points A, B, C, D, and E are located on a circle, as shown below. How many line segments having two of these points as endpoints can be drawn?

More Similar Questions