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Alex73 [517]
2 years ago
11

Find the length of the third side. If necessary, round to the nearest tenth. 25 20 ​

Mathematics
1 answer:
Komok [63]2 years ago
3 0

Answer:

15

Step-by-step explanation:

using \: pythagoras \: theorem \\ let \: the \: unknown \: side = x \\ 25 {}^{2}  = x {}^{2}  + 20 {}^{2}  \\ 625 = x {}^{2}  + 400 \\ x {}^{2}  = 625 - 400 \\ x {}^{2}  { = 225} \\ x =  \sqrt{225}   \\ x = 15 \\ lenght \: of \: the \: third \: side = 15

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