If the area of the circle is `A_1` and the area of the regular pentagon inscribed in the circle is `A_2,` then find the ratio `(A_1)/(A_2)dot`

The area of a circle is A 1 and the area of a regular pentagon inscribed in the circle is A 2 ​ . Then A 1:A 2 ​ is

A_0, A_1 ,A_2, A_3, A_4, A_5 be a regular hexagon inscribed in a circle of unit radius ,then the product of (A_0A_1*A_0A_2*A_0A_4 is equal to

In the circuit of figure A_1 and A_2 are ideal ammeters. Then the reading in ammeter A_2 is

A circle is inscribed inside a regular pentagon and another circle is circumscribed about this pentagon.Similarly a circle is inscribed in a regular heptagon and another circumscribed about the heptagon. The area of the regions between the two circles in two cases are A_1 and A_2 , respectively. If each polygon has a side length of 2 units then which one of the following is true?

If A,A_1,A_2 and A_3 are the areas of the inscribed and escribed circles of a triangle, prove that 1/sqrtA=1/sqrt(A_1)+1/sqrt(A_2)+1/sqrt(A_3)

If A_1 is the area of the parabola y^2=4 ax lying between vertex and the latusrectum and A_2 is the area between the latusrectum and the double ordinate x=2 a , then A_1/A_2 is equal to

A body A starts from rest with an acceleration a_1 . After 2 seconds, another body B starts from rest with an acceleration a_2 . If they travel equal distances in the 5^(th) second, after the start of A , then the ratio a_1 : a_2 is equal to :

The capacitance of the capacitors of plate areas A_1 and A_2(A_1 lt A_2) at a distance d is

The capacitance of capacitor of plate areas A_1 and A_2 ( A_1 ltA_2 at a distance d is

Let A_r ,r=1,2,3, , be the points on the number line such that O A_1,O A_2,O A_3dot are in G P , where O is the origin, and the common ratio of the G P be a positive proper fraction. Let M , be the middle point of the line segment A_r A_(r+1.) Then the value of sum_(r=1)^ooO M_r is equal to (a) (O A_1(O S A_1-O A_2))/(2(O A_1+O A_2)) (b) (O A_1(O A_2+O A_1))/(2(O A_1-O A_2) (c) (O A_1)/(2(O A_1-O A_2)) (d) oo