Question

18. Simplify: (a) 8-13×3√8(b) 323×31319. The sides of triangle are 8cm, 15cm and 17 cm. Find the area of this triangle.

Answer 1

Hii Mate !!


Here is your answer :



Solution :


(a) 8 - 13 × 3√8


=> 8 - 39√8


( b ) 323 × 31319


=> 1013897.


( c ) Sides of triangle are : 8 cm , 15 cm and 17 cm.


Let , First sides ( A ) = 8 cm.


Second side ( B ) = 15 cm


And,

Third side ( C ) = 17 cm.


Therefore,



Perimeter of a triangle = First side + Second side + Third side = 8 + 15 + 17 = 40 cm.


Therefore,

Semi perimeter ( S ) = Perimeter of triangle/2 = 40/2 = 20 cm.




• ( Semi perimeter - First side ) = 20 - 8 = 12 cm.


• ( Semi perimeter - Second side ) = 20 - 15 = 5 cm


And,

• ( Semi perimeter - Third side ) = 20 - 17 = 3 cm.


Therefore,


Area of triangle = √S(S - A ) ( S - B ) ( S - C ).


=> √20 × 12 × 5 × 3 cm².



=> √2*2*5*2*2*3*5*3

=> 2*2*3*5


=> 60 cm²


Hence,


Area of triangle is 60 cm².


Hope it helps you ♥


By Rishi403


BeBrainly...

Answer 2

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