Respuesta :

a=90 degrees divide by 5
=18 degrees
2c+a=90
2c+18=90
2c=90-18
2c=72
divide each side by 2
c=36
therefore:
2c=72

b=4a+c
b=4(18)+36
b=72+36
b=108

Answer:

a=90 degrees divide by 5

=18 degrees

2c+a=90

2c+18=90

2c=90-18

2c=72

divide each side by 2

c=36

therefore:

2c=72

b=4a+c

b=4(18)+36

b=72+36

b=108

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