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igor_vitrenko [27]
3 years ago
5

Help me with this!!!!!!

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
5 0

Answer:

16.3

Step-by-step explanation:

You can use pynthagoras theorem.

And round it to nearest tenth...

hope i helped

Talja [164]3 years ago
5 0

Answer:

16.3 feet

Step-by-step explanation:

find the value of the missing side using the pythagorean theorem -

a^{2} + b^{2} = c^{2}  ->  3^{2} +a^{2} =7^{2}  ->  9 + a^{2} = 49  ->  a^{2} = 40  -> take the square root of both sides: \sqrt{a} = \sqrt{40}  ->  a = 6.3

then you add it with the other two sides to get the perimeter: 6.3 + 3 + 7 = 16.3

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