ABC is a triangle

AB=8cm

BC=14cm

Angle ABC=106

Calculate the area... correct to 3 significant figures.

Even with splitting it up into right angled triangles doesn't work...

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- January 6th 2010, 01:24 PMMukilabWorking out area
ABC is a triangle

AB=8cm

BC=14cm

Angle ABC=106

Calculate the area... correct to 3 significant figures.

Even with splitting it up into right angled triangles doesn't work... - January 6th 2010, 01:30 PMpickslides

In your case

- January 6th 2010, 01:47 PMMukilab
- January 6th 2010, 01:48 PMMukilab
This calculates to -40...... can't be the area.

- January 6th 2010, 01:58 PMpickslides
- January 6th 2010, 02:05 PMpickslides
- January 7th 2010, 08:39 AMMukilab
I do study, I just find it hard to locate the correct and adequate resources. I don't know any greek signs apart from theta so if you could explain that in words....

- January 7th 2010, 12:31 PMpickslides

The only greek letter in my statement was theta.

The statement means that for all angles between 0 and 180 sin will be positive. Therefore the result you are after must be positive as we are taking that postive result and multiplying it by only positive numbers. - January 7th 2010, 12:37 PMe^(i*pi)
- January 7th 2010, 01:21 PMMukilab
Pickleslides, what does the upside down A mean than?

- January 7th 2010, 01:24 PMpickslides
- January 7th 2010, 01:35 PMMukilab
Har so I was right ^^

Thanks - January 7th 2010, 02:08 PMDvdHntr
How can't you split into right angled triangles??

First use cosine rule to work out the length of the remaining side = 17.94cm

Then use sine rule and basic calculation (180-angle = other angle) to work out

BCA = 25.39

CAB = 48.61

Then use use trig functions (sine and cosine) to work out length and height of triangles

And calculate the triangle with 1/2 base times height.

A = 53.8cm2 - January 7th 2010, 02:11 PMpickslides