A semi-circle has a diameter of 32cm there is a another hole which is a semi-circle with a diameter of 16cm .Find the perimeter of the bigger semi-circle.(Take PI as 22/7)

Perimeter of Circles

Perimeter of the object is 91.4285 cm

Step-by-step explanation:

The perimeter of a circle is defined as

The perimeter of outer arc will be

The perimeter of inner arc will be

Where is radius of bigger semicircle and is radius of smaller semicircle

Given diameter of outer semicircle  = 32 cm

= 32/2 = 16 cm

Given diameter of outer semicircle  = 16 cm

= 16/2 = 8 cm

So the perimeter of the object =

Perimeter P = 22/7 * (16 +8 ) + 2 * 8 =

P = 22/7 * 24 +16

So P = 75.4285 +16 = 91.4285 cm

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

so then what are you asking?

step-by-step explanation: