In ΔWXY, y = 940 inches, mm∠Y=100° and mm∠W=38°. Find the length of w, to the nearest inch.
Question
In ΔWXY, given:
- y = 940 inches
- mm∠Y = 100°
- mm∠W = 38°.
Find the length of w, to the nearest inch.
Solution
To solve this problem, we will use the Law of Sines, which 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.
First, let's find the measure of ∠X. We know that the sum of the angles in a triangle is 180°. So, ∠X = 180° - ∠Y - ∠W = 180° - 100° - 38° = 42°.
Now, we can use the Law of Sines to find the length of side w. We have:
w/sin(∠W) = y/sin(∠Y)
Substituting the given values, we get:
w/sin(38°) = 940 inches/sin(100°)
Solving for w, we get:
w = (940 inches * sin(38°)) / sin(100°)
Using a calculator to find the sine values and perform the multiplication and division, we find that w is approximately 588 inches, to the nearest inch.
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