Pace_T
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- Oct 21, 2004
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- 2005
I don't know what I'm doing wrong, but I just can't work out the first three questions from fitzpatrick Can anyone please help me?
1. P,A,B,C are four points in a plane such that angles BPA and CPA are obtuse and on opposite sides of PA. PA = 8cm, BP=10cm, PC=12cm, AB=14cm and AC=18cm. Calculate the length of BC and the area of the triangle ABC.
2. P,A,B,C are four points in order on a straight road that runs up a hillside and makes a constant angle of 10degrees with the hoizontal. A flagpole whose height is h meters stands at P. From A and B, the top of the flagpole has elevations of 30 degrees and 5 degrees respectively above the horizontal. If AB is 100m long, what is the height of the flagpole?
If BC is also 100m long, what is the elevation of the top of the flagpole from C?
3. From a point, P, a man observes that the angle of elevation of the top of a cliff, A, is 40 degrees. After walking 100 m towards A along a straight rode, inclined upwards at an angle of 15 degrees to the hoizontal, the nalge of elevation of A is observed to be 50 degrees. Find the vertical height of A above P.
All your help is greatly appreciated!!!
1. P,A,B,C are four points in a plane such that angles BPA and CPA are obtuse and on opposite sides of PA. PA = 8cm, BP=10cm, PC=12cm, AB=14cm and AC=18cm. Calculate the length of BC and the area of the triangle ABC.
2. P,A,B,C are four points in order on a straight road that runs up a hillside and makes a constant angle of 10degrees with the hoizontal. A flagpole whose height is h meters stands at P. From A and B, the top of the flagpole has elevations of 30 degrees and 5 degrees respectively above the horizontal. If AB is 100m long, what is the height of the flagpole?
If BC is also 100m long, what is the elevation of the top of the flagpole from C?
3. From a point, P, a man observes that the angle of elevation of the top of a cliff, A, is 40 degrees. After walking 100 m towards A along a straight rode, inclined upwards at an angle of 15 degrees to the hoizontal, the nalge of elevation of A is observed to be 50 degrees. Find the vertical height of A above P.
All your help is greatly appreciated!!!