Respuesta :

Answer:

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Step-by-step explanation:

thelonepolar

Answer:

Since the sum of the angles of a triangle equal 180 degrees.

2x+5x+15+4x=180

11x+15=180

11x=165

x=15

ABC=2x=2(15)=30 degrees

BCA=4x=4(15)=60 degrees

CAB=5x+15=5(15)+15=90 degrees

Step-by-step explanation:

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