Jane has a 5 × 7-inch photograph that she wants enlarged to a 10 × 14-inch photograph.
what is the scale factor from the original photograph to the enlarged photograph?

Both length and breadth are doubled or multiplied by 2 inch

scale factor will be 1:2 or 1/2 or 0.5

the one below it is a function

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.