If `A` is the area and `2s` is the sum of the sides of a triangle, then `Alt=(s^2)/4` (b) `Alt=(s^2)/(3sqrt(3))` `2RsinAsinBsinC` (d) `non eoft h e s e`

If A is the area and 2s the sum of the sides of a triangle,then

If A is the area and 2s is the sum of the sides of a triangle,then A<=(s^(2))/(4) (b) A<=(s^(2))/(3sqrt(3))2R sin A sin B sin C( d) none of these

If triangle is the area and 2s is the perimeter of triangleABC , then prove that triangle le s^(2)/(3sqrt(3))

If S_(n) is the sum of the first n terms of an A.P. then : (a) S_(3n)=3(S_(2n)-S_n) (b) S_(3n)=S_n+S_(2n) (c) S_(3n)=2(S_(2n)-S_(n) (d) none of these

If a/(sinA)=K , then the area of "DeltaA B C" in terms of K and sines of the angles is (K^2)/4s in A\ s in B\ s in C (b) (K^2)/2s in A\ s in B\ s in C 2K^2s in A\ s in B\ "sin"(A+B) (d) none

Using vectors: Prove that if a,b,care the lengths of three sides of a triangle then its area Delta is given by Delta=sqrt(s(s-a)(s-b)(s-c)) where 2s=a+b+c

If a,b,c are the sides of a triangle and s=(a+b+c)/(2), then prove that 8(s-a)(s-b)(s-c)<=abc

The ratio of the area of a square of side a and that of an equilateral triangle of side a, is 2:1 (b) 2:sqrt(3)4:3( d) 4:sqrt(3)

An equilateral triangle SAB is inscribed in the parabola y^(2)=4ax having its focus at S. If chord AB lies towards the left of S, then the side length of this triangle is 2a(2-sqrt(3)) (b) 4a(2-sqrt(3))a(2-sqrt(3))(d)8a(2-sqrt(3))