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Triangle DEF is equilateral. Find AE.

 

 

DA = 3, AF = 2

 Feb 13, 2024
 #1
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Law of Cosines

 

AE^2 = AF^2  + FE^2  - 2 (AF * FE) cos (60°)

 

AE^2  = 2^2 + 5^2  - 2(2* 5) (1/2)

 

AE^2  = 19

 

AE = sqrt (19)

 

cool cool cool

 Feb 13, 2024

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