how do i upload a image?

can i assume that a triangle is a right one if the image is drawn to scale and it looks like one? or i can only assume that if there is that square that indicates 90 degrees? thank you!

the number p is obtained by moving the decimal point 2 places to the left in the positive number n. the number s is obtained by moving the decimal point 1 place to the right in the number n. the number p+s is how many times n? thanks!