1.(a) Find the distance between P(-4,-3) and Q(3,-3).
1.(b) If the area of triangle PQR is 21 sq.units,and the coordinates of R are (4,k),find the two possible values of k.
maths question (help)
2007-08-29 6:26 pm
回答 (3)
2007-08-29 6:34 pm
✔ 最佳答案
1a)The distance = 3-(-4) = 7
1b)
Height of triangle = (21x2) / 7 = 6
So k can be (-3+6)=3 or (-3-6)=-9
暑期功課自己做啦(指
2007-08-29 9:00 pm
1.(a)PQ=3-(-3)
=6(unit)
1.(b)PQxheight/2=area of triangle
PQx6/2=21
PQ=7(unit)
So the two possible values of k are
k=4+7
=11
k=4-7
=-3
=6(unit)
1.(b)PQxheight/2=area of triangle
PQx6/2=21
PQ=7(unit)
So the two possible values of k are
k=4+7
=11
k=4-7
=-3
2007-08-29 6:32 pm
1.(a) Find the distance between P(-4,-3) and Q(3,-3).
(-4,-3)-3.5(3,-3).0
(-4,-3)-3.5(3,-3).0
收錄日期: 2021-05-02 13:41:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070829000051KK01157