Answer:
BC = 39
Step-by-step explanation:
<h3>a²+b² = c²</h3><h3>15²+36² = 1521</h3><h3>

</h3><h3>=39</h3>
Answer:
true
Step-by-step explanation:
I think it’s (3,4) the third answer
Answer:
No
Step-by-step explanation:
The formula you could do to check would be 8^2+9^2=12^2.
In this instance, 8^2 + 9^2 = 145 but 12^2 equals 144