Answer:
It's 16m
Step-by-step explanation:
Let's say the missing side is C, and since the triangle is right-angle triangle, you can use Pythagoras theorem. Which is
C squared is equal to A squared plus B squared
Like this: c^2 = a^2+b^2
Then
c^2= (10)^2 + (12)^2
c^2= 100 + 144
c^2= 244
c=
c = 15.6
Hope this helps :)
Number 1 is 2 because first you find out how many times 42 goes into 84 so you do 42x1, 42x2 and so on until you can't do anymore without going over 84 so 42x2 is 84 exactly so you put the two on top of the "house" above the 4 and put 84 under 84 then subtract 84-84=0 so you don't continue dividing and the number on top of the "house" is the answer
