Geometry the triangle has an area of 40cm squared.Find the height H of the triangle.

Question

hba · Answer

Assume base length = 2h +6
Area = 1/2 * base * height
40 = 1/2 * (2h+6) * h
40 = (h+3)h
40= h^2 +3h
h^2 +3h -40 = 0
( h +8)(h -5) = 0
so h = 5 or -8
But h > 0 so h = 5
Therefore h = 5 cm

unklerhaukus · Answer

http://openstudy.com/users/unklerhaukus#/updates/4ffbe53ae4b00c7a70c4ba3b

lgbasallote · Answer

@hba how did base length become 2h + 6?

unklerhaukus · Answer

how can you assume the base length @hba??

hba · Answer

cant we assume

lgbasallote · Answer

in math we dont assume

anonymous · Answer

yes until you put "h" in it

anonymous · Answer

Thanks For Your Good answers :)

lgbasallote · Answer

@hba in the case of yahoo answers ( http://answers.yahoo.com/question/index?qid=20120212152005AALS3Tw ) there was a given value of length in this case where the length is not given you cannot assume it's that

hba · Answer

k

lgbasallote · Answer

however @KateÜü if your question is same to yahoo answers...then you can assume that

hba · Answer

thanks

anonymous · Answer

:)