This discussion is closed.
mick665544
Badges: 0
#1
Report Thread starter 17 years ago
#1
Can anyone help with this prob?
Put it on my site for u all.

http://www.cobsc.co.uk/question.jpg

Thanks
0
elpaw
Badges: 15
Rep:
?
#2
Report 17 years ago
#2
is A a right angle?
0
gemgems89
Badges: 15
Rep:
?
#3
Report 17 years ago
#3
(Original post by mick665544)
Can anyone help with this prob?
Put it on my site for u all.

http://www.cobsc.co.uk/question.jpg

Thanks
I've had too much of a busy day to think, but I know the bottom bit is a trapezium which may come in useful..there again it may not.
0
mick665544
Badges: 0
#4
Report Thread starter 17 years ago
#4
(Original post by elpaw)
is A a right angle?
It doesnt say so, diagram i have says not to scale and doesnt show right angle sign.

Whole Question is:

In the triangle ADE
BC is parallel to DE

AB = 8cm
AC = 5cm
BD = 4cm
BC = 9cm

a) work out the length of DE
b) Work out the length of CE


Not sure about trapezium rule, dont you have to know the area, would have two unknowns in that equation.
0
elpaw
Badges: 15
Rep:
?
#5
Report 17 years ago
#5
(Original post by mick665544)
It doesnt say so, diagram i have says not to scale and doesnt show right angle sign.

Whole Question is:

In the triangle ADE
BC is parallel to DE

AB = 8cm
AC = 5cm
BD = 4cm
BC = 9cm

a) work out the length of DE
b) Work out the length of CE


Not sure about trapezium rule, dont you have to know the area, would have two unknowns in that equation.
ah you haven't put down the length bc. that helps.

DE = (4+8)/8 * 9 = 13.5cm

CE = 4/8 * 5 = 2.5 cm
0
gemgems89
Badges: 15
Rep:
?
#6
Report 17 years ago
#6
(Original post by elpaw)
ah you haven't put down the length bc. that helps.

DE = (4+8)/8 * 9 = 13.5cm

CE = 4/8 * 5 = 2.5 cm
Ah I knew there must have been something wrong!
0
mick665544
Badges: 0
#7
Report Thread starter 17 years ago
#7
(Original post by elpaw)
ah you haven't put down the length bc. that helps.

DE = (4+8)/8 * 9 = 13.5cm

CE = 4/8 * 5 = 2.5 cm


how did u manage that?
0
:P:P:P:P:P
Badges: 0
Rep:
?
#8
Report 17 years ago
#8
(Original post by mick665544)
how did u manage that?
Its a trapezium ... h(a+b)/2
0
elpaw
Badges: 15
Rep:
?
#9
Report 17 years ago
#9
(Original post by mick665544)
how did u manage that?
scale factors
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Following the government's announcement, do you think you will be awarded a fair grade this year?

Yes (535)
51.1%
No (512)
48.9%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise