Asked by jim
area of triangle XYZ
given:side z=11 side x=7 and side y=13
what are the angles and area please?
please explain
given:side z=11 side x=7 and side y=13
what are the angles and area please?
please explain
Answers
Answered by
Reiny
If you are given all 3 sides, you must use the cosine law.
lets find ange Ø, where Ø is opposite the 13
(I always find the largest angle, because the calculator will give us the correct angle if the angle is obtuse)
13^2 = 11^2 + 7^2 - 2(11)(7)cosØ
154cosØ = 121 + 49 - 169
cosØ = 1/154 = .00649
Ø = 89.63°
You now could use the Sine Law to find a second angle
The third angle is then trivial.
lets find ange Ø, where Ø is opposite the 13
(I always find the largest angle, because the calculator will give us the correct angle if the angle is obtuse)
13^2 = 11^2 + 7^2 - 2(11)(7)cosØ
154cosØ = 121 + 49 - 169
cosØ = 1/154 = .00649
Ø = 89.63°
You now could use the Sine Law to find a second angle
The third angle is then trivial.
Answered by
jim
could you elaborate?im kind of new to this.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.