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marusya05 [52]
3 years ago
11

Please help me with this question.

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
8 0

Answer:

See below in bold.

Its the second choice.

Step-by-step explanation:

The  sides b and d are the legs of a 30-60-90 triangle so the sides are in the ratio 2 : 1 :√3   where 2 = the hypotenuse.  

Here the hypotenuse = 10. Therefore:

10 = 2*5, so d = 1/2 * 10 and b = √3*5.

d = 5 , b =  5√3.

Now a , b and c are also the sides of a 30-60-90 triangle and we know that b = 5√3.

So  a ( the hypotenuse = 2 * 5√3 = 10√3.

and c ( the longest leg) =  5√3 *  √3 = 15.

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