jawabannya: c.145°
penjelasannya:
dik: CBA=90°
BAC=55°
Dit:a.acb
b.bcd
jwbn:
a).ACB=180°-(-CBA+<BAC)
=180°-(90°+55°)
=180°-145°
=35°
b).ACB+BCD=180°
35° +BCD=180°
<BCD=180°-35°
<BCD=145°
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Verified answer
jawabannya: c.145°
penjelasannya:
dik: CBA=90°
BAC=55°
Dit:a.acb
b.bcd
jwbn:
a).ACB=180°-(-CBA+<BAC)
=180°-(90°+55°)
=180°-145°
=35°
b).ACB+BCD=180°
35° +BCD=180°
<BCD=180°-35°
<BCD=145°