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27 Jun 2022, 23:15
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Difficulty:
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94% (00:50) correct
6%
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based on 18
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Five congruent equilateral triangles are combined to form the shape shown above. If the perimeter of this shape is 210, then what is the perimeter of one such triangle?
A. 30
B. 35
C. 42
D. 90
E. 105
Attachment:
1.png [ 3.87 KiB | Viewed 1091 times ]
29 Jun 2022, 06:10
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Since all triangles are equilateral triangles, the sides will be equal, let this be S
The perimeter of this shape is made up of 7 sides, thus 7S = 210 (count the sides of the shape in the diagram)
S = 30 (one side of the triangle)
Perimeter of an equilateral triangle = 3S = 3*30 = 90
Answer choice (D)
The perimeter of this shape is made up of 7 sides, thus 7S = 210 (count the sides of the shape in the diagram)
S = 30 (one side of the triangle)
Perimeter of an equilateral triangle = 3S = 3*30 = 90
Answer choice (D)
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