tolong dijawab ya, no 1 dan 2 tidak usah dijawab
Penjelasan dengan langkah-langkah:
GARIS DAN SUDUT
3. B
4x + 15 + 3x + 10 + 2x + 5 + x = 180
(4+3+2+1)x + 30 = 180
10x = 180 – 30
x = 150
10
x = 15
COE = 5x + 15
COE = 5×15 + 15
COE = 90°
4. A
3x = 180 – 120
x = 60
3
x = 20°
2y = 180 – 150
y = 30
2
y = 15°
z = 180 – 60 – 30
z = 90°
x + y + z = 20 + 15 + 90
x + y + z = 125°
5. C
Pelurus ACB = 90° + 35°
Pelurus ACB = 125°
6. C
5 sudut putaran penuh
24
= 5 × 360°
24
= 5 × 15
= 75°
sudut lancip
7. C
3y = 180° – 102°
3y = 78°
y = 78°
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