You need to do the pythangorean theorum for this. The equation is a[tex]a^{2} +b^{2} =c^{2}[/tex]. Fill in the letters. 4=a. 15=b. so: [tex]4^{2} +15^{2} =c^{2}[/tex]. Now solve. 4 squared is 16. 15 squared is 225. 225+16= 241. [tex]241=c^{2}[/tex] [tex]\sqrt{241}[/tex] =15.5 is the answer
