Picture Math Triangle Puzzle: Find the Missing Number

In this Picture Math Triangle Puzzle, your challenge is to find the missing number. Can you solve this Triangle Puzzle to decode the number that replaces the question mark in one of the triangles?

Picture Math Triangle Puzzle: Find the Missing Number

The answer to this "Missing Number in Triangle Puzzle", can be viewed by clicking the button. Please do give your best try before looking at the answer.

The answer is 4.
Multiplying downside corner numbers of the triangle and then subtracting the upper corner number to get the central number.
Let's denote the missing number with A. It means 2*A-2=6 which gives A=4.

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