tolonggg dongg saya butuh jawabannya dan caranya skrg, tolong bngt...nnti saya jdikan jwbn terbaik

1.)
b° = 180° - 90° - 28° = 62°

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2.)
y° = 180° - 80° - 50° = 50°

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3.)
x° = 180° - 70° - 25° = 85°

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4.)
a° = 180° - 70° = 110°
b° = 180° - 110° - 30° = 40°
c° = 180° - 70° - 20° = 90°

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5.)
y° = 180° - 110° = 70°
z° = 45°
x° = 180° - 70° - 45° = 65°

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6.) a.)
2x + x + 40° + 4x + 35° = 180°
7x + 75° = 180°
7x = 105°
x = 15°

6.) b.)
besar sudut masing-masing :
• 2x = 2 × 15° = 30°
• x + 40° = 15° + 40° = 55°
• 4x + 35° = 4 × 15° + 35° = 60° + 35° = 95°

6.) c.)
segitiga sembarang

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7. a.)
2x + 3x + 40° = 180°
5x + 40° = 180°
5x = 140°
x = 28°

7.) b.)
besar sudut P = 2x = 2 × 28° = 56°

7.) c.)
besar sudut R = 3x = 3 × 28° = 84°

7.) d.)
segitiga sembarang

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8.)
a.) sudut PRS = 180° - 70° - 90° = 20°
b.) sudut QPS = 0°
c.) sudut RPS = 70°
d.) sudut QPR = 70°
e.) sudut RSP = 90°
f.) sudut PRQ = 180° - 70° - 70° = 40°
g.) sudut PQR = 70°