Answer:
a squared + b squared = c squared.
Explanation:
a is the length of the longest side to square that and b is the other side so square that too. so a squared is 4, b squared is 9, this means u have to add 9 and 4. then u get 13 and the square root of that is the length of c. happy to help
/ \
this side is a / \ this side is b length is 3
the length is 2 /____\
this is unknown