Answer:
Either of the following square values:
Step-by-step explanation:
The three possible answers correspond to the square of the sides of the triangles via the Pythagorean theorem. And these are:
A) 60 percent of 30 is 18
B) if there are 30 students total and 18 of them are girls then 30-18=12 so 12 are boys
:D have a good day!