josieward josieward

03-02-2024
Mathematics

contestada

what’s is the length of a triangle when two sides are 10.4cm and has an angle of 120

Respuesta :

KiaraL2006 KiaraL2006

03-02-2024

Answer:

18.0 cm

Step-by-step explanation:

use the cosine rule:

a^2=b^2+c^2-2bcCos(A)

a^2=10.4^2+10.4^2-2x10.4x10.4Cos(120)

a^2=324.48

a=sqrt(324.48)

a=18.0cm (1dp)

hope this helps :)

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