Answer:5
Step-by-step explanation:
you need to use Pythagoreans theorem
a^2 + b^2 = c^2
said out loud it sounds like
a squared plus be squared equals c squared
The first thing to know is that C is your hypotenuse
That means it is both
- The longest side of your triangle
- Side that is across form the 90 degree or right angle
That's the only side that really matters, when you are using the theorem. The other 2 can be switched and it won't make a difference.
for this problem
a=unknow
b=12
c=13
a^2 + 12^2 = 13^2
a^2 +(12)(12) = (13)(13)
a^2 + 144 = 169
-144 -144
a^2 = 25
take the square root of both sides
a = 5
