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Verified answer
JawabA = 1/5 (180 - A)
5A = 180 - A
6A = 180
A= 30
Penyikunya = 90-30 = 60
Verified answer
Kelas 8 MatematikaBab Garis dan Sudut
a + 1/5 a = 180°
6/5 a = 180°
a = 180° . 6/5
a = 150°
Sudut yang dimaksud
= 150° . 1/5
= 30°
Besar sudut penyiku
= 90° - 30°
= 60°
✩✩ C ✩✩