Problem

Solve the triangle $A B C$, if the triangle exists.
\[
A=41.5^{\circ} \quad a=8.7 m \quad b=10.4 m
\]
Select the correct choice below and fill in the answer boxes within the choice.
A. There is only 1 possible solution for the triangle.
The measurements for the remaining angles $B$ and $C$ and side $c$ are as follows.
\[
\mathrm{m} \angle \mathrm{B}=
\]
\[
\mathrm{m} \angle \mathrm{C}=7^{\circ}
\]
The length of side $\mathrm{c}=$
(Round to the nearest
(Round to the nearest (Round to the nearest tenth tenth as needed.) tenth as needed.) as needed.)
B. There are 2 possible solutions for the triangle. The measurements for the solution with the longer side $c$ are as follows. $\mathrm{m} \angle \mathrm{B}=$
\[
\mathrm{m} \angle \mathrm{C}=
\]
The length of side $\mathrm{c}=$
(Round to the nearest
(Round to the nearest (Round to the nearest tenth tenth as needed.) tenth as needed.) as needed.)
The measurements for the solution with the shorter side $\mathrm{c}$ are as follows.
\[
\mathrm{m} \angle \mathrm{B}=\mathrm{L}^{\circ}
\]
$\mathrm{m} \angle \mathrm{C}=$
(Round to the nearest
(Round to the nearest tenth as needed.)
The length of side $\mathrm{c}=$
(Round to the nearest tenth as needed.)
C. There are no possible solutions for this triangle.

Answer

Expert–verified
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Answer

So, there is only 1 possible solution for the triangle.

Steps

Step 1 :We are given two sides and an angle opposite to one of the sides in a triangle. This is a case of solving a triangle using the Law of Sines. The Law of Sines states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all three sides of the triangle.

Step 2 :We can use this law to find the angle B first. After that, we can find angle C by subtracting the sum of angles A and B from 180 (since the sum of angles in a triangle is 180 degrees).

Step 3 :Finally, we can find the length of side c using the Law of Sines again.

Step 4 :\[\mathrm{m} \angle \mathrm{B}= \boxed{52.4^\circ}\]

Step 5 :\[\mathrm{m} \angle \mathrm{C}= \boxed{2.2^\circ}\]

Step 6 :The length of side \[\mathrm{c}= \boxed{10.5 m}\]

Step 7 :So, there is only 1 possible solution for the triangle.

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