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53+56=109
180-109=71
acb=71
180 -56=124
124+32=156
180-156=124
cdf=124
kalau ada yang kurang jelas tanya aja
= 127 - 56
= 71
b. ∧CDF = 180-(∧ABC - ∧BCD)
= 180-(56 - 32)
= 180-24
= 156