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Use the Law of Sines.
m ∠C = 90^(∘)
a ≈ 17.5
b ≈ 39.3
We need to solve the given triangle. Let's begin by color coding the opposite angles and sides. We will also call the unknown sides a and b. It will help us use the Law of Sines later.
Let's find the measure of ∠C, and side lengths b and a one at a time.
To find m ∠C we can use the Triangle Sum Theorem. This tells us that the measures of the angles in a triangle add up to 180.
To find the side length b of the given triangle, we can use the Law of Sines. b/sin B = c/sin C Let's substitute c= 43, m ∠B = 66^(∘), and m ∠C = 90^(∘) to calculate b.
Substitute values
LHS * sin 66^(∘)=RHS* sin 66^(∘)
Use a calculator
Round to 1 decimal place(s)
We found that the given triangle is a right triangle. Therefore, we can use the Pythagorean Theorem to find the side length a of the given triangle. In our triangle, a and b are the legs and c is the hypotenuse of a right triangle. We are given a triangle with b≈ 39.3 and c= 43. Let's substitute these values into the formula.
Substitute values
Round to 1 decimal place(s)
Since a negative side length does not make sense, we only need to consider positive solutions.
With all of the angle measures and side lengths, we can complete our diagram.