Question

Aka h need to a plastic trim on a shaped window, the window is made using a rectangle and a semi circle, height is 172cm, base is 118cm. Akash estimate that he will need 700cm of plastic trim total, is akash estimate is sensible

Answer 1

Akash estimate of 700cm of plastic trim is not sensible because he needs more than that.

The diagram of the question is below.

The window is made of a semi circle and a rectangular. More like a composite figure.

Composite figure;

Composite figure are 2 dimensional figures that combines two or more two dimensional figures. Therefore, the part the plastic trim was applied are those sharp line region. It's like finding the perimeter of the whole shaded region.

He estimate he will need 700 cm of plastic trim in total. Therefore, let check if his estimate is sensible.

Therefore,

• whole perimeter where plastic trim will be applied = perimeter of the rectangle + perimeter of the semi circle + 2(radius of the semi circle).

radius = 59 cm

perimeter of the rectangle = 2(113) + 2(118) = 462 cm

perimeter of the semi circle = 3.14 × 59 = 185.26 cm

Two radius = 2(59) = 118 cm

Therefore,

whole perimeter where plastic trim will be applied  = 462 + 185.26 + 118 =  765.26 cm.

learn more on composite figure here; https://brainly.com/question/4546057