Answer:
c=20 or SU = 20
Step-by-step explanation:
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Use the Pythagorean theorem:
a²+b²=c²
Plug it in:
12²+16²=c²
144+256=400
c²=400
c=√400
c=20
There did i finish on time!!? XD
I think you forgot to add the diagram. Add a picture and I will be able to help
