Perhatikan gambar di berikut., besar sudut B adalah…., a.45\xb0, b.47\xb0, c.49\xb0, d.55\xb0

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Perhatikan gambar di berikut.
besar sudut B adalah….
a.45°
b.47°
c.49°
d.55°​

ff02036beb1f330ad28234aacb22989d

Jawab: 59°

Penjelasan dengan langkah-langkah:

2x-21+x-12=180°

3x=213°

x=71°

B=x-12

=71-12

=59°


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