What is the area that f the polygon?

Area of polygon = 16.11  square cm

Step-by-step explanation:

From the figure we can divide the polygon into two quadrilateral,

1) a square with side 3.6 cm

2)  a rectangle with dimensions 2.1 x 1.5

To find the area of square

Area = side x side = 3.6 x 3.6

= 12 .96 square cm

To find the area of rectangle

Area = Length x Breadth

= 2.1 x 1.5 = 3.15 square cm

Area of polygon

Area  = 12.96 + 3.15 = 16.11  square cm

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1