Answer:
Step-by-step explanation:
To determine a volume, you need a volume formula.
<u>Volume:</u>

- L stands for length: 7.1
- W stands for width: 5.2
- H stands for height: 3.4
<u>Multiply these numbers from left to right.</u>

- <u>Therefore, the correct answer is 125.5m³.</u>
I hope this helps you! Let me know if my answer is wrong or not.
All equilateral triangles are acute, as all the angles are 60 degrees.