Answer: 5 cm
Explanation: use a ruler to determine the circumference of ones forehead
It might be Diverse? Since diverse means showing a great deal of variety
Answer:
A, B, E
Explanation: I just did the question:)
The lens aperture is usually specified as an f-number, the ratio of focal length to effective aperture diameter. A lens typically has a set of marked "f-stops" that the f-number can be set to. A lower f-number denotes a greater aperture opening which allows more light to reach the film or image sensor.