Diagonals

What x-gon has 54 diagonals?

Result

x =  12

Solution:

Solution in text x =
Solution in text x = : Nr. 1

Checkout calculation with our calculator of quadratic equations.








Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




To solve this verbal math problem are needed these knowledge from mathematics:

Looking for help with calculating roots of a quadratic equation? Would you like to compute count of combinations?

Next similar math problems:

  1. N-gon
    ngon How many diagonals has convex 11-gon?
  2. Combinations
    math_2 From how many elements we can create 990 combinations 2nd class without repeating?
  3. Combinations
    trezor_1 How many elements can form six times more combinations fourth class than combination of the second class?
  4. 2nd class combinations
    color_circle From how many elements you can create 4560 combinations of the second class?
  5. Roots
    parabola Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ?
  6. Quadratic equation
    kvadrat_2 Find the roots of the quadratic equation: 3x2-4x + (-4) = 0.
  7. Equation
    calculator_2 Equation ? has one root x1 = 8. Determine the coefficient b and the second root x2.
  8. Discriminant
    Quadratic_equation_discriminant Determine the discriminant of the equation: ?
  9. Theorem prove
    thales_1 We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
  10. Calculation of CN
    color_combinations Calculate: ?
  11. Fish tank
    zebra_fish A fish tank at a pet store has 8 zebra fish. In how many different ways can George choose 2 zebra fish to buy?
  12. Trinity
    trojka How many different triads can be selected from the group 43 students?
  13. A student
    test_14 A student is to answer 8 out of 10 questions on the exam. a) find the number n of ways the student can choose 8 out of 10 questions b) find n if the student must answer the first three questions c) How many if he must answer at least 4 of the first 5 que
  14. Menu
    jedalnicek On the menu are 12 kinds of meal. How many ways can we choose four different meals into the daily menu?
  15. Chords
    chords How many 4-tones chords (chord = at the same time sounding different tones) is possible to play within 7 tones?
  16. Blocks
    cubes3_1 There are 9 interactive basic building blocks of an organization. How many two-blocks combinations are there?
  17. Examination
    examination The class is 21 students. How many ways can choose two to examination?