Picture Math Triangle Puzzle and Answer for School Students

This Triangle Math Puzzle is for school students. In this Triangle Math Puzzle, there are four numbers in and outside of the triangle. These numbers share some logical relationship with each other. Can you decipher the logical connection in-between the given numbers in the triangle and find the value of the missing number?

What number will replace the question mark?

The answer to this "Triangle Picture Math Puzzle", can be viewed by clicking on the answer button.

The answer is 1
The logic used in this Triangle Math Puzzle is as below
D = (AxA) +(BxB) +(CxC)
where D is the central number and A, B, and C are the numbers around the triangle in an anti-clockwise direction starting from the top of the triangle.

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