Answer:
4.76 degrees
Step-by-step explanation:
The support beam 1 from the diagram is built 9 inches to the right of the beginning of the ramp and is 0.75 inches tall.
This is shown in the diagram below:
Using trigonometry:
![\begin{gathered} \tan \theta=\frac{\text{Opposite}}{Adjacent} \\ \tan \theta=\frac{\text{0}.75}{9} \\ \theta=\arctan \text{ }\frac{\text{0.}75}{9} \\ \theta=4.76^0 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/dezu6a8fgzuu2nz9c650ylw0fvtpotbx34.png)
The angle measurement in degrees between the ground and the beginning of the ramp is 4.76 degrees.