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igor_vitrenko [27]
3 years ago
5

Can someone help me find the answer?

Mathematics
2 answers:
raketka [301]3 years ago
8 0

Answer:

AC=9 cm

ABC is not a right angled triangle

Step-by-step explanation:

AB=8cm

BC=5cm

22=AB+BC+AC

AC=22-8-5

AC=9

since AC is the longest,

using Pythagoras theorem

AC^2=BC^2+AB^2

9^2=8^2+5^2

81=64+25

81=89

therefore, it is not a right angled triangle

Gnesinka [82]3 years ago
3 0

Answer:

No it is not a right triangle.

Step-by-step explanation:

Use the Pythagorean theorem to answer this question

1. find the missing side

8+5+x=22

13+x=22

x=9

2. Plug what you know into the Pythagorean theorem

a^2 +b^2=c^2

8^2+5^2=9^2

(if this  is true then it is a right angle)

64+25=81

89≠81

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