Question

What is the length of MO?
1 ,√3,
2 , 3

Answer 1

if that is a right triangle with hypotenuse = 2 you can use pythagoras
a^2 + b^2 = c^2

in this case c (the hypotenuse) is 2, and one leg (call it leg b) is 1
so you have
a^2 + 1^2 = 2^2
or
a^2 +1 = 4
can you finish ?