So the meaning of two angles being complimentary simply means that the two angles add up to 90 degrees. Lets call the two angles x and y where x is the smaller angle. x + y = 90 We also know that y, being the larger angle is 3 times x. y = 3*x Given these two we can solve the problem with basic algebra! x + y =90 x + (3*x) = 90 4*x = 90 x = 90/4 x = 22.5 y = 3 * x y = 3*(22.5) y = 67.5
Approximately (assumption: this tree is perpendicular to the ground.)
Step-by-step explanation:
Refer to the diagram attached (not drawn to scale.)
Label the following points:
: stake in the ground.
: top of the tree.
: point where the wire is connected to the tree.
: point where the tree meets the ground.
Segment would then denote the wire between the tree and the stake. The question states that the length of this segment would be . Segment would represent the between the top of this tree and the point where the wire was connected to the tree.
The question is asking for the height of this tree. That would correspond to the length of segment .
If this tree is perpendicular to the ground, then . Triangle would be a right triangle with segment as the hypotenuse.
The question states that the angle between the wire (segment ) and the ground (line ) is . Therefore, .
Notice, that in right triangle , segment is the side opposite to the angle . Therefore, the length of segment could be found from the length of the hypotenuse (segment ) and the cosine of angle .
.
Rearrange to obtain:
.
In other words, the wire is connected to the tree at approximately above the ground.
Combine that with the length of segment to find the height of the entire tree: