The circumference (c) of a circle is 16 cm. which formula can you use to find the diameter (d) if you know that c = πd?

The circumference (C) of a circle is 16 cm.

Circumference C =

The approximate value of is 3.14

Given C = 16

We plug in 16 for C and 3.14 for in the formula C = . then solve for d

C =

16 = 3.14 * d

'd' is multiplied with 3.14. To get 'd' alone we divide by 3.14 from both sides

5.09554 = d

So diameter of the circle = 5.1 cm

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)