Kunci Jawaban Matematika Kelas 8 SMP Halaman 67-71 Ayo Berlatih 7.1 Lingkaran, Lengkap Terbaru

b) m∠BGE; = 180° - m∠CGB
= 180° - 120°
= 60°

c) m∠AGD = besar sudut siku-siku
= 90°

d) m∠DGE; = 180° - m∠AGC - m∠AGD
= 180° - 60° - 90°
= 30°

11. Berdasarkan gambar di samping, tentukan: a. m∠ZXV, b. m∠YXW, c. m∠ZXY, d. m∠VXW (lihat gambar di buku)

Jawaban :

4x° + 15° = 2x° + 65°
4x° - 2x° = 65° - 15°
2x° = 50°
x° = 50° / 2
x° = 25°

Baca Juga: Kunci Jawaban Matematika Kelas 8 SMP Halaman 260 261 Ayo Berlatih 9.4 Nomor 1-5 Kurikulum 2013

a) m∠ZXV = 2x° + 65°
= (2 x 25°) + 65°
= 50° + 65°
= 115°

b)  m∠YXW = 4x° + 15°
= (4 x 25°) + 15°
= 100° + 15°
= 115°

c) m∠ZXY = 180° - m∠YXW
= 180° - 115°
= 65°

d) m∠VXW = 180° - m∠ZXV
= 180° - 115°
= 65°