It is an acute triangle since all the sides are less than 90 degrees (it's also equilateral)
Answer:
6
Step-by-step explanation:
Use a calculator
Answer:
Step-by-step explanation:
Andrew made a mistake at last step.
<u>It should be:</u>
- -11.8 + 9.8 = 9.8 - 11.8 = -2 but not -21.6