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Can anyone send working of this please ?
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5 votes
Can anyone send working of this please ?

Can anyone send working of this please ?-example-1
User Lweller
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1 Answer

3 votes
The parallel lines create similar triangles. Which means sides are proportional...

(BR)/(CS) = (AR)/(AS)

(BR)/(CS) = (10)/(14) = (5)/(7)
So if then the ratio of AR to AS = 5/7
Create a proportion with the other similar triangle that contains the shared side:

(5)/(7) = (e)/(18)
Cross multiply
e =
(90)/(7)=12 (6)/(7)
User Bennysantoso
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