How many Triangles?
Geometry
Level
2
If the two sides of a triangle measures 15 and 10 units, respectively. Find the number of triangles that can formed if the third side is an odd number.
The answer is 9.
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1 solution
the third should be in the range of (5,25), because it cannot be greater than sum of other two sides and also it can't be smaller than their difference. so total no. of triangles possible are just the number of odd digits between 5 to 25