What #4?

*fake answers are reported*

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

Point s lies between points r and t on . if rt is 10 centimeters long, what is st? 2 centimeters 4 centimeters 6 centimeters 8 centimeters

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?