PLEASE HELP ME!!!! WILL MARK BRAINLIEST

Answer:
5
Step-by-step explanation:
Pythagoras's theorem dictates that a squared + b squared = c squared when talking about sides on right angled triangles with a and b being flat sides and c being the hypotenuse which gives us the forumula below
3 squared + 4 squared = 25 route 25 = 5
Answer:
Step-by-step explanation:
[tex]Distance=\sqrt{(x_2-x_1)^{2}+(y_2-y_1)^{2}}\\\\d_{3}=\sqrt{(2-[-1])^{2}+(0-4)^{2}}\\\\ =\sqrt{(2+1)^{2}+(-4)^{2}}\\\\ =\sqrt{(3)^{2}+(-4)^{2}}\\\\=\sqrt{9+16}\\\\ =\sqrt{25}\\\\ =5[/tex]