Question

in a plane l parallel to m there are six points on l and 6 points on m how many triangle can be formed using these points​

Answer 1

Answer:

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Step-by-step explanation:

If all six points are on the same line you couldn't make any triangles, so we're going to assume that no three of them are on the same line.

If all six points are on the same line you couldn't make any triangles, so we're going to assume that no three of them are on the same line.You can select one of 6 points for your first axis, 5 are left for the second and 4 for the third.

If all six points are on the same line you couldn't make any triangles, so we're going to assume that no three of them are on the same line.You can select one of 6 points for your first axis, 5 are left for the second and 4 for the third.However, if we're making a triangle it doesn't matter what order the points are selected in. Swapping the second and points results in the same triangle, so we need to divide by 2. It also doesn't matter which of the 3 points you start at, so we divide by 3.

If all six points are on the same line you couldn't make any triangles, so we're going to assume that no three of them are on the same line.You can select one of 6 points for your first axis, 5 are left for the second and 4 for the third.However, if we're making a triangle it doesn't matter what order the points are selected in. Swapping the second and points results in the same triangle, so we need to divide by 2. It also doesn't matter which of the 3 points you start at, so we divide by 3.6*5*4/(3*2) = 5*4 = 20 uniquite triangles.