In 0394abc, If The Length Of Side B Is 3 Centimeters And The Measures Of 2220b And 2220c Are 45\Xb0 And 60\Xb0, Respectively, What Is The Length Of Si
In ΔABC, if the length of side b is 3 centimeters and the measures of ∠B and ∠C are 45° and 60°, respectively, what is the length of side c to two decimal places?
Answer:
The length of side c is 3.68 cm.
Step-by-step explanation:
For any oblique triangle (non-right triangle) given the measurement of its two angles and a side (Side-Angle-Side/SAS or Angle-Angle-Side/AAS), apply the Law of Sines to find the unknown measurements of a side of angle.
Law of Sines:
a/SinA = b/SinB = c/SineC
Where:
a, b, and c are the sides opposite the interior angles A, B, and C, respectively.
Given:
b = 3 centimeters
B = 45°
c =unknown
C = 60°
Find the length of side c:
b/SinB = c/SinC
3/Sin 45° = c/Sin 60°
(Sin 45°) (c) = (3) (Sin 60°)
c = (3) (Sin 60°) / (Sin 45°)
c = (3) (0.866) /( 0.707)
c = 2.598/0.707
c ≈ 3.67468 or 3.675
c ≈ 3.68 cm (up to two decimal places)
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