Posted by lindsay on Saturday, April 21, 2012 at 5:18pm.
given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate
1. the size of the largest angle
2. the area of the triangle

trigonometry  Reiny, Saturday, April 21, 2012 at 5:24pm
1.
the largest angle is opposite the largest side, so set your cosine equation up this way:
9^2 = 7^2 + 8^2  2(7)(8)cosØ
2.
once you have that angles use the area formula
area = (1/2)(a)(b)sinØ , where Ø is the contained angle.

trigonometry  Etedheke harrison, Friday, April 8, 2016 at 11:15am
Find the a triangle whose sides are 7cm,8cm,and 9cm
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