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Question

The equations of the sides of a triangle are x=0,y=m1x+c1 and y=m2x+c2. The area of the triangle

A
c1c2m1m2
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B
12(c1c2)2m1m2
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C
12(c1c2)(m1m2)2
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D
(c1c2)2(m1m2)2
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Solution

The correct option is B 12(c1c2)2m1m2

Let x=0 is the base of the triangle, and the length of the base of the triangle is c2c1 from the figure.

The height of the triangle is the x coordinate of the point where y=m1x+c1 and y=m2x+c2 meet i.e R.

m1x+c1=m2x+c2x=c2c1m1m2

Area of the triangle =12×base×height=12×(c2c1)×c2c1m1m2

Area =12(c2c1)2|m1m2|

800403_770204_ans_2a99221edd3e479281fb4f5e0eff17e0.JPG

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