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#1 2017-10-18 08:49:52

taylorn5683
Member
Registered: 2017-02-01
Posts: 10

area of polygons review

Calculate the area for each of the polygons below. If you do not know an equation to use, divide the polygon into other shapes to determine the area.

1.  An equilateral triangle with a side of 1 inch

2. A square with a side of 2 feet

3. A regular pentagon with a side of 3 centimeters

4. A regular hexagon with a side of 10 cm

5. A regular heptagon with a side of 7 inches

6. A trapezoid where the height is 18 cm, base 1 = 16 cm and b2 = 8 cm.

7. A trapezoid where the height = 7 mm, base 1 = 26 mm and base 2 = 9 mm.

Fill in the missing information for the following trapezoids:

8.  height = 19.8 cm
b1 = ________
b2 = 14.4 cm
area = 401.94 cm2




9. height = 23 mm
b1 = 23 mm
b2 = ________
area = 529 mm2

10. height = ________
b1 = 20 cm
b2 = 21 cm
area = 205 cm2

11. height = 28.9 m
b1 = 26.9 m
b2 = ________
area = 806.31 m^2

12. If the area of a parallelogram is 690.84 m^2 and the height is 20.2 m, what is the length of the base?

13. If the base of a rectangle is 28 cm and the area is 588 cm^2, what is the height of the rectangle?

14. If the height of a rectangle is 26.1 m and the base is 17.3 m, what is the area of the rectangle?

15. If the height of a parallelogram is 34 cm and the base is 15 cm, what is the area of the parallelogram?

16. What is the area of a parallelogram with height 26 cm, base 16 cm, and side length 28 cm?

17. What is the area of a regular octagon with a side of 6 cm?




18. What is the area of this polygon?


                                       
ls_XF    =    53 mm    ls_XV    =    72 mm    ls_VR    =    16 mm
ls_FB    =    31 mm    ls_BT    =    31 mm    ls_EU    =    47 mm
ls_UL    =    31 mm    ls_TL    =    88 mm    ls_DE    =    16 mm
ls_RM    =    70 mm    ls_MC    =    21 mm    ls_DC    =    70 mm


19. What is the area of this rectangle?



20. What is the area of this polygon?

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#2 2017-10-18 09:00:00

taylorn5683
Member
Registered: 2017-02-01
Posts: 10

Re: area of polygons review

8.  height = 19.8 cm
b1 = ___26.2_____
b2 = 14.4 cm
area = 401.94 cm2




9. height = 23 mm
b1 = 23 mm
b2 = ______23__
area = 529 mm2

10. height = __10______
b1 = 20 cm
b2 = 21 cm
area = 205 cm2

11. height = 28.9 m
b1 = 26.9 m
b2 = __28.9______
area = 806.31 m^2

12. If the area of a parallelogram is 690.84 m^2 and the height is 20.2 m, what is the length of the base?

34.2 m

13. If the base of a rectangle is 28 cm and the area is 588 cm^2, what is the height of the rectangle?

21 cm

14. If the height of a rectangle is 26.1 m and the base is 17.3 m, what is the area of the rectangle?

451.53m

15. If the height of a parallelogram is 34 cm and the base is 15 cm, what is the area of the parallelogram?

510

19. What is the area of this rectangle?



78 


I need help showing work I did most of it on a calulator.

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#3 2017-10-19 22:44:56

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,155

Re: area of polygons review

Hi Taylor

Since you joined the forum you have started 6 threads  Each consists of 20 homework questions  I asked you to read the forum policy on help but you are still doing it several posts later. This is likely to result in you being banned.  Please reply with a proper request for help making it clear where your difficulty lies.

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#4 2017-11-15 10:38:37

laurenwest144
Member
Registered: 2017-11-15
Posts: 2

Re: area of polygons review

Hi, I am working on the same assignment and I am having trouble working on finding the missing base of a trapezoid. Could you help me? If so that would be greatly appreciated.

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#5 2017-11-15 14:21:30

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,374

Re: area of polygons review

Hi laurenwest144,

Given in MathsIsFun


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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