Problem

Solve the triangle. \[ \mathrm{A}=51^{\circ}, \mathrm{C}=67^{\circ}, \mathrm{C}=11 \] \[ B=\square^{\circ} \] $a=\square$ (Do not round until the final answer. Then round to one decimal place as needed.) $b=\square$ (Do not round until the final answer. Then round to one decimal place as needed.)

Solution

Step 1 :To solve the triangle, we first find the missing angle \( B \) using the fact that the sum of angles in a triangle is \( 180^{\circ} \).

Step 2 :Since \( A = 51^{\circ} \) and \( C = 67^{\circ} \), we calculate \( B \) as follows: \( B = 180^{\circ} - A - C \).

Step 3 :Substitute the given values: \( B = 180^{\circ} - 51^{\circ} - 67^{\circ} \).

Step 4 :Calculate the value of \( B \): \( B = 62^{\circ} \).

Step 5 :Now, we use the Law of Sines to find the missing sides \( a \) and \( b \). The Law of Sines states that \( \frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C} \).

Step 6 :To find \( a \), we rearrange the formula: \( a = c \cdot \frac{\sin A}{\sin C} \).

Step 7 :Substitute the given values: \( a = 11 \cdot \frac{\sin 51^{\circ}}{\sin 67^{\circ}} \).

Step 8 :Calculate the value of \( a \) and round to one decimal place: \( a = 9.3 \).

Step 9 :To find \( b \), we rearrange the formula: \( b = c \cdot \frac{\sin B}{\sin C} \).

Step 10 :Substitute the given values: \( b = 11 \cdot \frac{\sin 62^{\circ}}{\sin 67^{\circ}} \).

Step 11 :Calculate the value of \( b \) and round to one decimal place: \( b = 10.6 \).

Step 12 :Final Answer: \( B = \boxed{62^{\circ}} \)

Step 13 :Final Answer: \( a = \boxed{9.3} \)

Step 14 :Final Answer: \( b = \boxed{10.6} \)

From Solvely APP
Source: https://solvelyapp.com/problems/E3r05PFfg2/

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