- AIf the angle of elevation of the top from a point on the ground is 45°, the height of the tower equals the distance of that point from the foot of the tower.
- BThe angle of elevation of the top is the same from every point on the ground.
- CThe height of the tower can be found from the angle of elevation alone, without knowing any distance.
- DAs a point moves closer to the foot of the tower, the angle of elevation of the top becomes smaller.
Step-by-Step Solution
tan 45 = 1, so and the height equals the distance. The angle changes from point to point and grows LARGER as the point comes closer, so one angle alone is never enough without a measured length.
Answer: A) If the angle of elevation of the top from a point on the ground is 45°, the height of the tower equals the distance of that point from the foot of the tower.