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storchak [24]
3 years ago
6

A seamstress is making a decorative pillow and wants to see lace around the trim. The pillow is in the shape of a triangle with

vertice (7,7)(10,3)(7,3). How many inches of lace will she need if each unit on the grid is one inch?
Mathematics
1 answer:
Vesna [10]3 years ago
5 0
I think it will be 8 1/3 inches. 
(7,7) and (7,3) are 4 units apart
   <u> 7-3</u>  = <u>4</u>
    7-7  = 0
(7,3) and (10,3) are 3 units away
  3-3 = 0; 10-7 = 3
(7,7) and (10,3) are 4/3 units away or 1 and 1/3
  <u>7-3</u> =  <u>4</u> 
 7-10 =-3
  Then, take the absolute value because you can't have negative inches of lace, you get 4/3 or 1 1/3. 
Add them all together for perimiter: 
 4+3+1 1/3 = 8 1/3 inches of lace

Hope this helps!
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