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Help please!!!!!!!!!!!!!!

Help please!!!!!!!!!!!!!!
asked 121k views
4 votes
Help please!!!!!!!!!!!!!!

Help please!!!!!!!!!!!!!!-example-1
asked
User Mohammed Mansoor
by
8.5k points

1 Answer

1 vote

Answer:

Hi,

Explanation:


cos(\angle\ B)=(BD)/(BC) =(4)/(x) =(BC)/(AB) =(x)/(20) \\\\x^2=80\\\\x=4√(5) \\\\\boxed{(x)/(4)=√(5) }

Not used:

CD²=16*4=64

CD=8

Help please!!!!!!!!!!!!!!-example-1
answered
User Wheelie
by
7.8k points
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