karena lingkaran nya hanya 3/4 jadi 360:4=90
360-90=270
2a+26a+40=270
28a+40=270
28a=270-40
28a=230
a=230:28=8,2142857143
a=8,2
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karena lingkaran nya hanya 3/4 jadi 360:4=90
360-90=270
2a+26a+40=270
28a+40=270
28a=270-40
28a=230
a=230:28=8,2142857143
a=8,2