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ajinkya bhole Grade: 10
        a parallelogram is cut by two sets of m parallel lines to its sides. find the no. of parallelograms formed.. 
8 years ago

Answers : (2)

Badiuddin askIITians.ismu Expert
147 Points

Dear ajinkya

parallelogram is cut by two sets of m parallel lines to its sides.

then we have  2 sets of (m+2) parallel lines ( 2 lines of the parallelogram)

so parallelogram is formed by taking 2 lines from each set

 = m+2C2 * m+2C2

 = [(m+2)(m+1)/2 ]2

 this also include 1 original parallelogram

 so total number of new parallelogram formed is  =   [(m+2)(m+1)/2 ]2   -1

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Askiitians Experts

8 years ago
15 Points
a and b sides of pgm is used as border. hence, 2 sides remain.- PART 1
if x given is more than exact amount, take x as x+1-PART 2
but here, we have 2 sides, i.e. x+2.-PART 3
SINCE WE HAVE 2 SETS, C(M+2,2)*C(M+2,2)
4 months ago
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