In delta RST m Solution10 D Coz side opposit to bigger angle

Solution

10. D.

Coz side opposit to bigger angle is always biggest and here u can see that R is the biigest angle and so on.

11. D.

Coz in the trangle sum of any two sides is always greater then 3rd one

12. A.

3<C<27 is the range of the third side of the triangle