Question

Look at the figure.


If the area of triangle ABC is 240 cm2, the area of triangle BDE is _____ cm2.

Answer 1

@experimentX

Answer 2

find the length of sides .... do you know how?

Answer 3

a proportion?

Answer 4

Bingo!!

Answer 5

i hope you can work it out ... can you?

Answer 6

BE/BA = BD/BC?

Answer 7

hmm ... give it a try!!

Answer 8

OK...
5/10 = 5/X
5 X 10 / 5 = 10

Answer 9

well ... find all sides. and use Heron's formula

Answer 10

Herons formula?

Answer 11

http://en.wikipedia.org/wiki/Heron's_formula

Answer 12

once you know the side ... you can find the area.

Answer 13

hold on let me try it

Answer 14

i got 120

Answer 15

really ... is that correct?

Answer 16

i am not sure

Answer 17

yea side DC and the height

Answer 18

Oh ... sorry.

Answer 19

no it was not correct.

Answer 20

hold on ... let me sort out other threads!!

Answer 21

suppose BE is 'x' ... find the value of BC and AC