Select the correct answerHow many parallelograms are formed by a set of 5 parallel lines intersecting another set of 8 parallel lines?Options14056280120
Question
Select the correct answer
How many parallelograms are formed by a set of 5 parallel lines intersecting another set of 8 parallel lines?
Options
- 140
- 562
- 280
- 120
Solution
The number of parallelograms formed by a set of parallel lines intersecting another set of parallel lines can be calculated using the formula: n(n-1)/2 * m(m-1)/2, where n and m are the number of lines in each set.
Step 1: Calculate the number of line intersections for each set of parallel lines separately.
For the set of 5 parallel lines: 5(5-1)/2 = 5*4/2 = 10
For the set of 8 parallel lines: 8(8-1)/2 = 8*7/2 = 28
Step 2: Multiply the number of line intersections for each set of parallel lines to get the total number of parallelograms.
10 * 28 = 280
So, the correct answer is 280.
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