60 meters of fencing is used completely to form an enclosed semi-circular region. what is the area of the semi-circular region? '

Step-by-step explanation:

Given:

Perimeter of the semi-circle = 60 m

let the radius of the semi-circle to be 'r'

Also,

Perimeter of the semi-circle = πr + 2r = ( π + 2 ) × r

on equating, we get

( π + 2 ) × r = 60 m

or

r =

now,

the area of the semi circle = πr² / 2

on substituting the value, we get

area =

or

area =

Hence,

the area of the semi-circular region =  

c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.

x-150=475   x=625

step-by-step explanation:

if the bike after the sale ($150) is $475 then just simply add 150 to 475.