Question

PLEASE HELP!!!!

The picture below shows a portion of a river dam:

Which of the following can be used to calculate the height of the river dam

Answer 1

you have to use tangent it would be tan41=x/100

Answer 2

The height of the river dam is 83.9 m

Explanation:

Given : AB is the height of the river dam

∠ACB=40°

BC = 100 m

To Find: The height of river dam i.e. AB

Solution:

Refer the attached file.

Perpendicular = AB

Base = BC = 100

To find the height of the river dam we will use trigonometric ratio.

`Tan\theta = (Perpendicular)/(Base)`

`Tan40^(\circ) = (AB)/(BC)`

`0.839 = (AB)/(100)`

`0.839*100 = AB`

`83.9= AB`

Hence the height of the river dam is 83.9 m