Answer:
40 cm equals 400 millimeters
I hope this helps you
Well, this question isn't really fair, considering that those sides aren't possible to make a square since a square has 4 congruent sides.
I hope this helps you
Pythagorean
hypothenus ^2=base^2+height ^2
hypothenus ^2=15^2+20^2
hypothenus ^2=225+400
hypothenus ^2=625
hypothenus ^2=25
The numbers are "x" and "y",
we suggest this system of equations.
x+y=24
x-y=15
solve by reduction method.
x+y=24
x-y=15
-----------------
2x=39 ⇒x=39/2=19.5
x+y=24
-(x-y=15)
-------------------
2y=9 ⇒y=9/2=4.5
The numbers are 19.5 and 4.5
To check
19.5+4.5=24
19.5-4.5=15