How Many Triangles Can You See In The Figure Below?

Time for a quick geometry lesson.

Count the number of triangles in the picture below;

So were you able to solve the riddle? Leave your answers in the comment section below.

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7 Replies to “How Many Triangles Can You See In The Figure Below?”

  1. Polygon (Pantagon)
    ABC, ACD, ADE, BCD, BDE,BEA, CDE, CEA,DAB, EBC = No. of triangles = n = 10
    AB, BC, CD, DE, AE = No of sides = r = 5
    Total Number of Triangles =?
    We use combination method: 10c5 = 10!/5!(10-5)!=10!/5!5!=(

    Note: nCr = n!/r!(n-r)!
    Dr. Nadeem Hussain Qureshi ([email protected])

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