Area of Outer Triangle composed of 2 inner triangles

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Area of Outer Triangle composed of 2 inner triangles

Thread starter zulfi100
Start date Jul 17, 2017

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Bordodynov

Jul 21, 2017

zulfi100 said:
Hi,
Thanks Wbahn for the clue:
are of ADG = 1/2 * AG * DG
= 1/2 * 3CE * 3DE
= 1/2 * 9 * CE * DE
= 1/2 * 9 * 84 (From post#1)
= 1/2 * 9 * 42
= 378
Good work Mr. Bordodynov and Mr. RBR1317 for drawing additional graphics.
God bless you all.
Zulfi.

Error
= 1/2 * 9 * 84 = 1/2 * 9 * 42 ?! Area=9*42

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