What are angles of impact?
Angles of impact is where blood hits and then moves the rest of the way according to gravity. Blood that does not land on a 90degree surface will hit at an angle. Once the blood hits something at an angle it will start to drip according to gravity. This can help to determine the point of origin of the blood splatter. The length of the blood stain is the hypotenuse while the width is the opposite side of the angle of impact. The angle of impact can be calculated from the measurement of the opposite side which is the width and the length is hypotenuse of the blood stain.