Use the distance formula, AB=√[(1-(-9)]²+[(-1-(-3)]=√[100+4]=√104
use the same formula, AC=√52, BC=√52
AC²+BC²=52+52=104=AB²
Yes, it is a right triangle.
The place value is millions place
54.7 cm because a squared + b squared = c squared
Stuck on the same thing, tried reviewing and reviewing but now I’ll just try finding the answer key