Coordinate Geometry Holiday HW
Answers to Coordinate Geometry Holiday HW:
1(a) 1/2 ; (b) y = (1/2)x + 2 ; (c) 10 units sq
2(a) 10 units ; (b)1/3 ; (c) y = (1/3)x + 7 ; (d) (12 , 7), (e) 60 units sq
3(a) ( -4 , 0) ; (b) ( 2 , 4 ) ; (c) 16 units sq
4. (Answers will be discussed in class.)
5(a) a = 2 ; (b) y = (1/2)x + 7 ; (c) -2 ; (d) y = -2x - 3 ; (e) ( -4 , 5)
6(a) y = -2x + 4 ; (b) A = ( 3 , -2) ; B = ( -3 , -2) ; C = (0 , 4)
7(a) A = ( 5 , 0) ; B = (8, 0) ; D = ( 2, 4)
(b) 12 units sq ; (c) 5 units ; (d) 2.4 units
Pls post any queries that you might have to any of the above questions by clicking on the comment feature. In the event that you need greater explanation for any of the questions, do comment as well.
If there are no queries posted here, it will be deemed that you guys have no problems with the questions, so I'll not go through them in class.
Thanks everyone!
posted by Miss Ng @ 6:15 PM
5 Comments:
Tan Rou Ming
Q5(a)
After solving the quadratic equation , a(sq)-24a+44=0, the values of 'a' would be 2 or 22. Why is it 2 instead of 22 when point A lies on the right side of the point B ? Hope that you can explain this . thank you !
For Q7(d),
What is the solution to this question ? Are we suppose to use A.maths methods to solve this question or is there another method ? Hope that you can discuss this question in class. Thank YOU !
Hi Rou Ming,
Thanks for pointing out to me Q5(a). The correct ans should be a=22. We should reject a=2 based on the diagram.
As for 7(d), the answer is 2.4 units.
There is no need to use A maths method to solve this qns. You can make use of the area of the parallelogram found in (b) and the formula for area of a parallelogram (Base Area x Perpendicular ht) to help you solve this question.
See if you can solve the question now with the above hint.
Any difficulties, I will discuss them during remedial class.
Thanks =)
See ya tml.
This comment has been removed by the author.
Hi miss ng,
for question 1(b), is it ok to write 2y = x + 4 ?
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