#1**+1 **

the 12 - 16 triangle has a hypotenuse of 20 (via pythag theorem)

20 is to 16 as x is to 20

20/16 = x/20

x = 25

ElectricPavlov Aug 5, 2020

#2**+2 **

Triangle with legs 12 & 16 has a hypotenuse of 144+256=400, sqrt400=20.

Now, realize that these are similar triangles (as an exercise, figure out why!)

So, we have 20:16=x:20

Solve that.

Inspirational Aug 6, 2020