7-12.

Mathematics
Tutor: None Selected Time limit: 1 Day

Mar 4th, 2015

In order for a triangle to be obtuse, the longest side must be bigger than the hypotenuse that would make the two short sides a right triangle.

7. 6,8,9  : 6^2+8^2 = 100 & 9^2 = 81  Acute triangle

8.  4, 2, 5 :   4^2+ 2^2 = 20   and 5^2 = 25  Obtuse Triangle

9. 10 , 2root 2 , 6 root 3    :  Right angle triangle

10.   15 , 20,  15    Acute triangle

11. 3, 3, 3root 2  : Right angle triangle 

12. 13 18 3 root 55      : Obtuse triangle

Mar 4th, 2015

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