Use Pythagorean thrm
17^2+10^2=21^2
289+100=441
389≠441
This is not a right triangle
The Hundredths place because 2 is in the thousandths place. 5 or more change the score, 4 or less let it rest. 8 remained the same because 2 is less than 4.
18 units squared multiply 6 times 3 to get this answer- 18u^2
