What is the perimeter of the green triangle?

56.43

Step-by-step explanation:

you add all the values of the legs and hypotenuse of the right triangle which gives you this answer

your welcome haha, this is the best place to find answers

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.