Zeo draws triangle abc on the coordinate plane. What is the approximate perimeter of triangle abc to the nearest hundredth? A.8.47units b.12 units C. 12.94 units or D.15.31 units

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.