Question

प्रश्न 1. दिए गए चित्र में DE||
BC तो x का मान ज्ञात करें ।​

Answer 1

Answer:

Since DE is parallel to BC,

AE/EC = AD/DB

1.8/2.5 = x/7.5

x = 1.8 x 3

x = 5.4

Answer 2

Given :  DE||BC

To find : Value of x

Step-by-step explanation:

DE || BC

Hence using Basic proportionality theorem ( Thales theorem)

AD/BD = AE/CE

AD = x

BD =  x-2

AE=x+2

CE = x - 1

=> x/(x - 2)  = (x + 2)/(x-1)

=> x² - x  = x² - 4

=> x = 4

AD = 4

BD = 2

AE = 6

CE = 3

4/2 = 6/3 = 2

Value of x = 2

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