Answer:
A=1/2b×h
28.8=1/2b×7.2
28.8=3.6b/ ÷3.6
<em><u>b</u></em><em><u>=</u></em><em><u>8</u></em>
Refer to the pic above.
Concepts used :
1. Trigonometric Properties
2. Domain limitation
3. assumption
Answer:
At least 0.9, so I think b.
Step-by-step explanation:
I think they’re perpendicular lines