Answer :
Answer:
a) By multiplying the length of the shadow of the tower to the ratio of the height of the exposed pencil placed in the ground to the length of the pencil's shadow the height of the tower can be found
b) Height of the tower = Level to which the clinometer was raided + length of the shadow of the tower × tan (Angle of elevation of the top of the tower)
Step-by-step explanation:
a) The steps to measure the length of height of the tower using similar triangles are as follows;
Whereby the ground over which the tower is located is flat, place the pencil in the ground and ensure that it is upright and standing on its own
1) Measure the length of the shadow of the pencil
2) Measure the height of the exposed (above the ground) pencil
3) Find the ratio of the height of the exposed pencil to the length of the pencil's shadow
4) Measure the length of the shadow of the tower
5) Multiply the length of the shadow of the tower to the ratio of the height of the exposed pencil to the length of the pencil's shadow to find the height of the tower
b) To measure the height of the tower by trigonometry and the materials they have, we have;
1) Measure the length of the shadow of the tower using the measuring tape. Record the length as l
2) From the end of the length of the shadow of the tower, measure the angle of elevation of the top of the tower using the clinometer. Record the angle of elvation as θ
3) Measure the distance from the ground the clinometer was raised to measure the height of the shadow and record it as H₁
The height of the tower can then be found by the following formula;
Height of the tower, h = H₁+ length of the shadow of the tower × tan(θ)
h = H₁ + l × tan(θ)