Final answer:
The angle of impact can be found using the sine function. By dividing the width of the bloodstain by the length, you can calculate the angle is approximately 30 degrees.
Step-by-step explanation:
To find the angle of impact, we need to use the sine function.
The length of the bloodstain is the opposite side of the angle, and the width is the adjacent side.
The sine function is defined as sin(angle) = opposite/hypotenuse. In this case, the hypotenuse is the length of the bloodstain.
sin(angle) = opposite/hypotenuse
sin(angle) = 1.5 cm / 3 cm
angle = arcsin(1.5/3)
Using a calculator, we find that the angle of impact is approximately 30 degrees.