# Thread: Find Area of ABC Triangle

1. ## Find Area of ABC Triangle

hi all....

i need your help how to easy find area of triangle ABC below
please, check this picture attachment..

any help,much appreciated..

m.susanto

2. ## Re: Find Area of ABC Triangle

Originally Posted by zidan3311
find area of triangle ABC below : this picture attachment..
Hint: $\Delta ABC$ has a base of $12c$ and height of $5c$.

3. ## Re: Find Area of ABC Triangle

Code:
C

B

D        A
Label your right angle vertex as D.

I see nuttin' wrong with making ADC a right triangle,
(thus B on CD); so area ABC = area ADC - area ADB.
So real easy...

What sayeth thou, Sir Plato?
Should I go back to church?

4. ## Re: Find Area of ABC Triangle

Originally Posted by Plato
Hint: $\Delta ABC$ has a base of $12c$ and height of $5c$.
the final result is (12*5):2=30 cm2
area of ABC = 30 cm2
it's true, Plato?

5. ## Re: Find Area of ABC Triangle

Originally Posted by zidan3311
the final result is (12*5):2=30 cm2
area of ABC = 30 cm2
it's true, Plato?
YES

6. ## Re: Find Area of ABC Triangle

Yes, it's true...but do you fully understand why?

7. ## Re: Find Area of ABC Triangle

thank so much guys, it helped, i learn step by step and keep focus...
i love this forum...

### ABCtriangle

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