How do you solve the triangle ABC given a=7, b=3, c=9?

Question

5170 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-02-25T14:03:13

As detailed below.

enter image source here

Steps 1 : Find the area of the triangle, having known three sides,

using formula #A_t = sqrt(s (s-a) (s - b) (s - c))# where is the semi

perimeter of the triangle.#s = (a + b + c) / 2#

Step 2 : with #A_t# known, Find one of the angles #hatA# using area formula for two sides and the included angle

#A_t = (1/2) b c sin A#

Step 3 : Apply Law of Ines to find the remaining two angles #hat B, hat C#

#color(white)(aaa aaaaaaa# Law of Sines
enter image source here