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Can someone help explain ??? Please
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Can someone help explain ??? Please

Can someone help explain ??? Please-example-1
User Kevin LeStarge
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1 Answer

2 votes

Answer:

x = 6

Explanation:

Look at the picture.

ΔADC and ΔCDB are similar (AA). Therefore the sides are in proportion:


(AD)/(DC)=(DC)/(DB)

We have


AD=9,\ DC=x,\ DB=4

Substitute:


(9)/(x)=(x)/(4) cross multiply


x^2=(9)(4)\\\\x^2=36\to x=√(36)\\\\x=6

Can someone help explain ??? Please-example-1
User Jublikon
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