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primary 5 | Maths
| Area & Volume
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Date Posted: 4 years ago
Views: 522
rect. = 15 x 21 = 315
unshaded = 0.5 x 12 x 15 = 90
shaded = 315 - 90 = ?
.
unshaded = 0.5 x 12 x 15 = 90
shaded = 315 - 90 = ?
.
Hi snell, May I ask so we assume yw = wx?
erhmm, ... nope
YW is not equal WX
YW is not equal WX
u mean to ask
the perpendicular height of the unshaded triangle is 15cm, isnt it?
ans: yes
the height of unshaded triangle is measured from ZY to VW perpendicularly,
which happens to be equal to WX
.
the perpendicular height of the unshaded triangle is 15cm, isnt it?
ans: yes
the height of unshaded triangle is measured from ZY to VW perpendicularly,
which happens to be equal to WX
.
Sorry to ask again.. so as long 2 lines are pendicular like the figure, I could assume the height of yw=wx?
it is wrong to assume " the height of yw=wx "
again,
YW is not equal WX
.
again,
YW is not equal WX
.
Noted thanks!
See 1 Answer
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Hi, area of triangle, the height is the perpendicular height with it base. Hence, for this question, height is equal to WX or VZ = 15. The base is ZY = 12. Hope this helps.
Date Posted:
4 years ago
Thanks ac lim & snell for your explanation!
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