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If 3 sides of a triangle are of lengths12 cm, 8 cm and 17 cm. then which type of triangle is this ?

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Since, `7+8 gt 12`
`:.` Triangle is possible.
Now, `("longest side")^(2)=(12)^(2)=144`
and sum of squares of other sides `=(7)^(2)+(8)^(2)=49+64=113`
Since `("longest side")^(2) gt` sum of squares of two other sides.
`:.` It is an obtuse angled triangle.
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