Answer:
r ≈ 44.25 cm
Explanation:
You want the hypotenuse of a right triangle in which the side adjacent to the angle of 57° is 24.1 cm.
Cosine
The cosine relation is ...
Cos = Adjacent/Hypotenuse
cos(57°) = (24.1 cm)/r
Solution
Solving for r gives ...
r = (24.1 cm)/cos(57°) ≈ 44.25 cm
The length r is about 44.25 cm.
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Additional comment
The calculator shown in the attachment has its angle mode set to degrees.
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