- A135
- B125
- C115
- D250
Step-by-Step Solution
The wall-ground angle (at the base of the wall) is 90°. The exterior angle at the foot of the ladder equals the sum of the two interior opposite angles = 90 + 35 = 125°.
Answer: B) 125
A ladder leans against a vertical wall, making a right-angled triangle with the wall and the ground. The ladder makes an angle of 35° with the wall at the top. The ground is extended beyond the foot of the ladder. Using the exterior angle property, find the exterior angle at the foot (between the ground extension and the ladder).
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