Respuesta :
D. 21cm because you divide all sides by 2 then get your slope form and multiply by seven
The three lengths that cannot be the lengths of the sides of a triangle are: 21m, 6m, 10m and it can be determine by using triangle inequality theorem.
Triangle inequality theorem can be use to determine which three lengths cannot be the lengths of the sides of a triangle.
According to the triangle inequality theorem the sum of any two sides of a triangle must be greater than or equal to the third side of the triangle.
Option A - Sides of triangle are: 23m, 17m, 14m
Option A represents the sides of a triangle because the sum of any two given sides is greater than the third side.
Option B - Sides of triangle are: 11m, 11m, 12m
Option B represents the sides of a triangle because the sum of any two given sides is greater than the third side.
Option C - Sides of triangle are: 5m, 7m, 8m
Option C represents the sides of a triangle because the sum of any two given sides is greater than the third side.
Option D - Sides of triangle are: 21m, 6m, 10m
Option D does not represents the sides of a triangle because the sum of any two given sides is not greater than or equal to the third side.
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https://brainly.com/question/22642276
