If the radius of a circle is r and the length of the arc subtended by a central angle is also r, then the measure of the angle is 1

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540