Langkah pengerjaan tertera di gambar yaa
80 + 4x = 180
4x = 180 - 80
4x = 100
x= 25
BCA
= 180-5x
= 180-5(25)
= 180-125
= 55
BAC
= 180 - BCA - ABC
= 180 - 55 - 80
= 180 - 135
= 45
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Langkah pengerjaan tertera di gambar yaa
80 + 4x = 180
4x = 180 - 80
4x = 100
x= 25
BCA
= 180-5x
= 180-5(25)
= 180-125
= 55
BAC
= 180 - BCA - ABC
= 180 - 55 - 80
= 180 - 135
= 45
Jadi besar BAC adalah B. 45°