# Any Maths peeps?

This discussion is closed.
#1
Can anyone help with this prob?
Put it on my site for u all.

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

Thanks
0
18 years ago
#2
is A a right angle?
0
18 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
#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:

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
18 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:

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
18 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
#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
18 years ago
#8
(Original post by mick665544)
how did u manage that?
Its a trapezium ... h(a+b)/2
0
18 years ago
#9
(Original post by mick665544)
how did u manage that?
scale factors
0
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