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leva [86]
3 years ago
5

Ramon was plotting the coordinates of a polygon. He has plotted the coordinates of the polygon shown below. What is the area of

Ramon's
polygon?

1. Point A (2.5)

2. Point B (8,5)

3. Point C (8,9)

4. Point D (5,7)

5. Point E (2.9)

V

E

C

9

8

D

7

6

ke

5

A

B

4

3

2

1

5

6

7

8

9.
Mathematics
1 answer:
allsm [11]3 years ago
3 0

Answer:

Area of polygon = 18

Step-by-step explanation:

the given points are :

Point A (2.5)

Point B (8,5)

Point C (8,9)

Point D (5,7)

Point E (2,9)

Firstly , create the array

A     2       5

B     8       5

C     8       9

D     5       7

E      2      9

A      2      5

Now,

Multiply the x coordinates of each vertex by the y coordinate of the next vertex . and then add the result.

⇒ 10 + 72 + 56 + 45 + 10 = 193 .......(1)

Now,

Multiply the y coordinate of each vertex by the x coordinate of next vertex. then add the result

⇒ 40 + 40 + 45 + 14 + 18 = 157   ........(2)

Now, Subtract equation (2) from equation (1), we get

193 - 157 = 36

Now, Divide by 2 to get the area of polygon

∴ we get

Area of polygon = 18

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