kathyrobertson1 kathyrobertson1

24-08-2018
Mathematics

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In triangle DEF = 18 and m angle F = 45. Find the length of a leg rounded to the to the nearest tenth.

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24-08-2018

Hello there!

If DEF = 18, we then use the sin method, or the law of sin.

18 divide by sin90 would be F = sin45 .

We therefore end up with 12.72 but rounded would be 12.7 as 2 is lower than 5, so, it just rounds back down to 7.

Your answer: 12.7

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