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.

398

Step-by-step explanation: First I find the area of the biggest triangle 20x20x1/2=200.

Then I find the area of the rectangle by cutting off the triangle at the end 6x30=180.

After that I find the area of the small triangle 6x6x1/2=18.

Finally, I add all the area up and 18+180+200= 398

Hope this helps :)

21.4 i did it already for s1

step-by-step explanation:

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer