Draw or write to explain why 1 hundred 4 tens and 14 tens name the same amount

280 names the same amount to 1 hundred 4 tens and 14 tens because 
100 + 40 + 140 = 280 
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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.