Question

←----A------B-----C-----D--→


Points A-B-C-D are collinear as shown in the figure. If I(AD) = 12,

1(AC) = 7 and 1(BD) = 9.

Find:

(i) l(AB), (ii) l(CD), (iii) I(BC)​

Answer 1

Answer:

AD=12

AC+BD=9+7=16

Since, in AC+BD, we use BC one extra time

=> AC+BD-BC=AD

or,16-BC=12

or,BC=16-12=4

i) AB= AC-BC= 7-4=3

ii) CD= BD-BC=9-4= 5

iii) BC=4

Explanation:

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