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19 May, 21:02

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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  1. 19 May, 21:15
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    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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