He has had 9 hours and 18 minutes sleep
Answer:
No
Step-by-step explanation:
If we use the Pythagorean theorem, we can find if it is a right triangle. To do that, set up an equation.

If the triangle is a right triangle, c would equal 11
Solve.

Then find the square root of 100.
The square root of 100 is 10, not 11.
So this is not a right triangle.
I hope this helps!
The value of the 1 in 214,278,216 is tens.
This is because it is in the tens spot.