Question

in triangle ABC AB 7cm BC 8cm AC 9cm find the value of radious of inner circle of triangle​

Answer 1

Answer:

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.