A triangle only has three sides. If you put three sticks together, you can make a triangle. If you had four sticks, you cannot make a triangle. That is why only three sticks are needed.
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Thats already a triangle if it three sides.
You could use the 3 stick to make the number 4 which is a perfect square.
There are only three kinds of triangle - equilateral, where all three sides are the same - isoceles, where only two sides are the same - and scalene, where no sides are the same. The right triangle is a special case of the isoceles or scalene. Even if you consider the right triangle different, which is is not, that only make five kinds of triangle.
no; a quadrilateral has four sides and a triangle has only three
I think the question you mean to ask is, "Do three collinear points make a triangle?" Linear is simply the adjective form of "line", "collinear" is used to describe points that lie on the same line. (Two points not only can be collinear, but always are, so it makes little sense to describe them as such).Collinear points cannot make a triangle, a triangle requires three noncollinear points.