Jawaban:
1.
a. 20°
b. 60°
2.
a. 30°
b. 90°
Penjelasan dengan langkah-langkah:
a.
3c+3c+3c= 180
9c= 180
c= 20
b.
A= 3c
= 3(20)
= 60°
180= 3b+2b+b
180= 6b
b= 30°
R= 3b
= 3(30)
= 90
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Jawaban:
1.
a. 20°
b. 60°
2.
a. 30°
b. 90°
Penjelasan dengan langkah-langkah:
1.
a.
3c+3c+3c= 180
9c= 180
c= 20
b.
A= 3c
= 3(20)
= 60°
2.
a.
180= 3b+2b+b
180= 6b
b= 30°
b.
R= 3b
= 3(30)
= 90