ozidolroks
Member
- Joined
- Feb 26, 2008
- Messages
- 36
- Gender
- Female
- HSC
- 2009
Need help in these question?
1. P,A,B and C are four points in a plane such that the angles BPA and CPA are obtuse and on the 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. Answer- 20.06cm,122.5 m2
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 10(degrees) with the horizontal. A flagpole whose height is h metres 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 elvation of the top of the flagpole from C? Answer-39.97m, depression 0(degrees) 56
3. I don't understand Question 7 b) in the 1997 HSC paper.
Thank you to anyone who can help me
1. P,A,B and C are four points in a plane such that the angles BPA and CPA are obtuse and on the 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. Answer- 20.06cm,122.5 m2
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 10(degrees) with the horizontal. A flagpole whose height is h metres 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 elvation of the top of the flagpole from C? Answer-39.97m, depression 0(degrees) 56
3. I don't understand Question 7 b) in the 1997 HSC paper.
Thank you to anyone who can help me