SOLUTION: How many 1 inch equiltateral triangles are needed to build a chain of triangles that has a perimeter of 20 inches?
Algebra.Com
Question 369336: How many 1 inch equiltateral triangles are needed to build a chain of triangles that has a perimeter of 20 inches?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
x+(x+1)+2 = 20
2x + 3 = 20, or 2x = 17, no integer solution.
x+x+2 = 20,
2x = 18, or x = 9. Therefore you need 2*9 = 18 1 inch equilateral triangles.(9 at the top, 9 at the bottom.)
RELATED QUESTIONS
how many triangles of perimeter 12 inches are there if the length of each side must be a... (answered by solver91311)
The perimeter of a square is 100 inches. How many square tiles 1 inch on each edge
are... (answered by jim_thompson5910,mestrydilip)
How many 4-inches by 8-inch bricks are needed to build a walk 6ft. wide and 24 feet... (answered by checkley77)
how many 4-inches by 8 inch bricks are needed to build a walk 6ft. wide and 24ft... (answered by Alan3354)
How many different obtuse triangles with integer side lengths and a perimeter of 20 can... (answered by greenestamps)
An acute triangle has a perimeter of 18. How many possible triangles are there if all... (answered by Edwin McCravy)
Sam is studying isosceles triangles. He wants to know how many isosceles triangles exist... (answered by edjones,richwmiller,Edwin McCravy)
An icosahedron has 20 faces, all of which are equilateral triangles. How many vertices... (answered by ikleyn)
Janice has 5 sticks of lengths 2,4,6,8, and 10 inches. using three sticks at a time as... (answered by Alan3354)