Question

15 lineas are drawn in a plane such that 4 of them are parallel .What is the maximum number of regions in whih pplane is divided

Answer 1

Step-by-step explanation:

take first line. there are (n-1) intersecting points.

take second line. there are (n-2) intersecting points (as one point has already been taken with first line)

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.

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take n th line. there (n-n)=0 new points.

add, (n-1+n-2+….n-n) = (nxn - (1+2+…+n) ) = n^2- (n)(n+1)/2= (n^2- n)/2

Answer 2

Answer:

When the retreating monsoon blows from the northeast across the Bay of Bengal, it picks up a significant amount of moisture, which is subsequently released after moving back onto the peninsula. ... That rainy extension of the generally dry retreating monsoon is called the northeast, or winter, monsoon.