Answer: 61 unit^2
Step-by-step explanation:
ABCD is a rectangle with dimensions 12 by 11, for a total area of 132 (square units). Although I could determine the lengths of the parallel lines of the interior trapezoid from the data supplied, I'm lazy and decided, instead, to subtract from the total rectangle area the areas of the four right triangles formed outside the shaded area. The area of each triangle is (1/2)b*h, and we are given those dimensions on the figure.
The four triangle areas:
TriD = 36
TriA = 6
TriB = 20
TriC = 9
Total area = 71 square units.
Subtract this from the rectangle's area: 132 - 71 = 61 units^2
This is the area of the shaded trapezoid.
Answer:
Squaring
Step-by-step explanation:
Answer:
The surface area is 
Step-by-step explanation:
<u>Step 1: Determine the area of the bottom</u>



<u>Step 2: Determine the area of the triangles</u>




There are two of these right triangles on every side which means that we have 8 of these triangles so we multiply the area that we got by 8.


<u>Step 3: Combine the area to get the surface area</u>


Answer: The surface area is 
Answer:
X = 28
Step-by-step explanation:
He should not have simplified 3/7 to 1/7 as they do not equal - he now has 2 less sevenths than before.