Math Problem Statement

Find all solutions to the following triangle. (Round your answers to one decimal place. If either triangle is not possible, enter NONE in each corresponding answer blank.) A = 116.9°, a = 43.3 cm, b = 23.2 cm First triangle (assume B ≤ 90°):

Solution

To solve the triangle, we need to determine the other angles and the remaining side using the given information: A=116.9A = 116.9^\circ, a=43.3a = 43.3 cm, and b=23.2b = 23.2 cm.

We can use the Law of Sines to find the angle BB:

asinA=bsinB\frac{a}{\sin A} = \frac{b}{\sin B}

Rearranging to solve for sinB\sin B:

sinB=bsinAa\sin B = \frac{b \cdot \sin A}{a}

Substituting the given values:

sinB=23.2sin116.943.3\sin B = \frac{23.2 \cdot \sin 116.9^\circ}{43.3}

Let's calculate this.The angle BB is approximately 28.528.5^\circ.

Since we assume B90B \leq 90^\circ, this solution is valid. Next, we'll find angle CC using the fact that the sum of angles in a triangle is 180180^\circ:

C=180ABC = 180^\circ - A - B

Let's calculate CC.The angle CC is approximately 34.634.6^\circ.

Now, let's find the remaining side cc using the Law of Sines:

csinC=asinA\frac{c}{\sin C} = \frac{a}{\sin A}

Rearranging to solve for cc:

c=asinCsinAc = \frac{a \cdot \sin C}{\sin A}

Let's calculate side cc.The length of side cc is approximately 27.5 cm.

So, the solutions for the triangle are:

  • B=28.5B = 28.5^\circ
  • C=34.6C = 34.6^\circ
  • c=27.5c = 27.5 cm

If you have any further questions or need additional details, feel free to ask!

Here are some related questions to explore:

  1. How would you solve for a different triangle if angle BB were greater than 90°?
  2. What if the given angle AA was an acute angle instead of an obtuse angle?
  3. How does the Law of Cosines compare with the Law of Sines for solving triangles?
  4. How would you verify if a triangle is possible given three side lengths?
  5. What is the significance of the ambiguous case in the Law of Sines?
  6. How would the solution change if one of the sides was the hypotenuse in a right triangle?
  7. What are the possible values of BB if multiple triangles were possible?
  8. How does the area of this triangle compare to one with different angles but the same side lengths?

Tip: When solving for triangles, always check if the given information might lead to an ambiguous case, especially when dealing with the Law of Sines.

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Math Problem Analysis

Mathematical Concepts

Triangle Geometry
Law of Sines
Angle Sum Property of Triangles

Formulas

Law of Sines: a/sin(A) = b/sin(B) = c/sin(C)

Theorems

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Suitable Grade Level

High School