Asked by lindsay
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
1. the size of the largest angle
2. the area of the triangle
Answers
Answered by
Reiny
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.
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.
Answered by
Etedheke harrison
Find the a triangle whose sides are 7cm,8cm,and 9cm
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