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SOH caa Toa Foundations of Mathematics and Pre-Calculus 10 Unit 7 Send-In Assignment On-Line Course 8. Using a protractor, measure one of the unknown angles and determine the length of side x. 17 mm 8 ) 518 mm 3 marks 9. Calculate the angle of elevation of the line of sight of a person whose eye is 1.8 m above the ground, and is looking at the top of a tree which is 27.5 m away from the base of the tree on level ground and 19.4 m high. (draw a diagram and answer to the nearest degree) height of tree = 19, 4 1716m 27, 5m Height of the person eye = 1:8 33 19.4 - 1.8 - 1716 height of diffrecenc= 17. 6 Tant : 0.640 1716 m = 3216 = 33 9) - 33 degrees 2715 m = 01 640 3 marks 10. A building is 53 feet high. At a distance away from the building, a 6 foot tall observer notices the angle of elevation to the top of the building is 430. How far is the observer from the base of the building? (draw a diagram and answer rounded to one decimal place) h/building = 53 Feet Tan 43 h / observer = 6 Feet = 019825 53- 6= 47 Feet F ingle = 43 degrees 0, 43 25 743 1 = 50 14 10) 501 4 m 3 marks Adapted fro Page 5 of 6