B. Parallel faces
Not all sides need to be parallel and a polygon has only 1 face unless cut
Answer:
We are given the lengths of the two segments of the line. Using the addition postulate we can obtain the segment of the entire line.
Did you draw out the diagram. We know that the three points are collinear.
Hope this helps
Step-by-step explanation:
1) 72 inch
2) 3ft
3) 120 cm
4) 12yd
The angle of elevation that the instruments have to record to be at the correct height is given as 79°
<h3>How to solve for the angle of elevation</h3>
We have 2x + 70 = 180
We have to find the value of x
2x = 110
x = 55
y/sin x = 225/sin70
This is the use of sine rule
From here we would have
y = 225(sinx/sin70)
Remember x = 55
y = 225(sin55/sin70)
y = 196.1378
tanθ = 1000/y
tan θ = 1000/196.1378
tanθ = 5.098
θ = tan⁻¹5.098
= 78.90°
Hence the conclusion is that the angle of elevation has to be 78.9 degrees for it to be at the correct height.
Read more on the angle of elevation here:
brainly.com/question/88158
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