Round the base angle to 70 degrees and use the sine ratio:
30*sine 70 degrees = 28.19077862 feet
Height of ladder from the ground = 28 feet to 2 s.f.
9
It is: 24 feet by using Pythagoras' theorem
43 degresses
18
About 15 degrees. Many, if not most, extension ladders today have a sticker on the side that shows a line that should be parallel to the ground when the ladder is at the proper safe angle.
The angle of elevation of the ladder leaning against the wall is approximately 48.59 degrees.
The preposition in the sentence is "against." The ladder was leaning against the roof.
115
9
If the angle between the ladder and the ground is 60 deg, and you know the angle between the ground and the wall is 90 deg, then you have a 30-60-90 degree triangle, which is a common triangle. You should memorize this one. The commonest sides of this right triangle are 4-5-6, with the longest side being the hypoteneuse, in this case the ladder leaning from the ground to the wall. The wall is 4m high, the base of the ladder would be 5m out from the wall, and the length of the ladder is 6m.
12
93
12 feet.
It can be any angle that is more than zero degrees and less than 90 degrees. <><><> It will be an ACUTE angle, and if the ladder is placed properly (1 ft out for each 4 ft up) the angle between wall and ladder will be ABOUT 18 degrees.
25.99 ft
A. 11 feet B. 13 C. 12 D. 14.
No, a ladder leaning against a wall is not in equilibrium. Equilibrium would occur if the forces acting on the ladder were balanced, but in reality, the ladder is subject to gravitational force and may slide or topple over if not properly stabilized.