Lisa has to cut her grandma's grass this weekend and wants to know exactly how much area she will be cutting. Calculate the area of the polygon. Be sure to show all your work and explain your answer. (PLEASE WRITE SENTENCES EXPLAINING)
I actually answered this question this morning
where?
To find the area of the polygon, let's split it into two different trapezoids like this: I also went ahead and wrote down the side lengths from the information they gave you
only i have \to put sentences
Okay, we can do that too. Were you able to calculate the area of the trapezoid?
give me a sec...
what am i caculating?
what numbers
The area of each trapezoid..
\( \sf Area ~of~a~ trapezoid = \left(\dfrac{base_1 + base_2}{2}\right) \times height\)
What is the area of the first trapezoid? |dw:1616861030250:dw| Base 1 is 26 Base 2 is 6 and the height is 20
7
how did you calculate that
i have no clue
the first base is 26 the second base is 6 the height is 20 area = 20 * (26+6) /2 what is 26 + 6 =
32
okay now what is 32/2 =
16
now what is 20 * 16
320
so that's the volume of the first trapezoid does that make sense?? Area = height * (base1 + base2) /2 height is 20 base1 is 26 base2 is 6 Area = 20 * (26+6)/2 Area = 20 * (32)/2 Area = 20 * 16 Area = 320
Does that make sense????
we still have to find the area of the second trapezoid
ok
What is the area of the second trapezoid? |dw:1616861679831:dw| Base 1 is 16 Base 2 is 10 and the height is 6
Can you do the same exact thing and find the area? Area = height * (base1 + base2) / 2 Plug in the numbers
53
how even
i dont knowww
plug in the numbers |dw:1616862109130:dw|
ohhh
13
what did you do to get 13
16+10 \ 2
okay, and then multiply it by 6
78
so that's the area of the second trapezoid the first one had an area of 320 the second one had an area of 78 the total area of the polygon is the area of both trapezoids combined together what is 320 + 78 = ?
398
so that's your final answer- the area that she'll be cutting
how do i put all that in sentences
+ as plus * as multiply a number as a number / as division ._.
Write down everything we did To calculate the area of the polygon, we have to split it into two trapezoids. The area of the first trapezoid is ... show all your work here The area of the second trapezoid is ... show all your work here The total area of the polygon is area of first trapezoid + area of second trapezoid which would be _____
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