Wiskundehulp
NLEN

Simulations

Change one value and see straight away what happens, with the explanation next to it.

  • y = x² − 1

    Parabola

    Explain what a, b and c do in y = ax² + bx + c.

    opens upward, two zeros

  • y = 2x + 1

    Linear function

    Explain what a and b do in y = ax + b, and when two lines intersect.

    rises: 1 to the right, 2 up

  • 91625

    3² + 4² = 9 + 16 = 25

    Pythagoras

    See why a² + b² = c² and calculate c with a square root.

    c = 5 (b = 4)

  • sin(30°) = 2 ÷ 4 = 0.5

    SOHCAHTOA

    Explain why sin(α), cos(α) and tan(α) depend only on the angle, not on how big the triangle is.

    the triangle grows, the ratio stays the same