Final answer:
The proper climbing angle for a ladder is 75º (D).
Step-by-step explanation:
The proper climbing angle for a ladder is 75º (D).
When a ladder is placed against a wall, the angle between the ladder and the ground is called the climbing angle. It is important to choose the correct climbing angle to ensure stability and safety when climbing the ladder.
The ideal climbing angle for a ladder is around 75º. This angle provides a balance between the ladder's stability and ease of climbing. If the climbing angle is too small, the ladder may slide or tip over. On the other hand, if the climbing angle is too large, it may be difficult to climb and maintain balance.