Ineed with this problem! i don't know how to solve this problem! me.

So.. notice the ratios there,
those ratios are good, when the triangle is
made up of, two 45 degree angles, 
and one 90
thus is called a 45-45-90 angle

the two legs are the same length
and the hypotenuse, or longest leg, 
whatever the others are, times square root
of 2

so.. one could say that 

Ithink the answer is discovery verbs because they are quite similar to the verb 'discovering'