kingcristian4 kingcristian4

10-02-2020
Mathematics

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What is the length of BC?

What is the length of BC class=

Respuesta :

slroylesr slroylesr

10-02-2020

Answer:

2.1

Step-by-step explanation:

a²=b²+c²-2bc cos A

a²=5²+6²-2*5*6* cos(20)

a²= 25+36-60* cos (20)

a²= 61-60*0.939

a²= 61-56.382

a²= √4.618

a= 2.15

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