tolong yah kak pake cara
Jawaban:
b = 30° (b)
PSR = 101 (c)
Penjelasan dengan langkah-langkah:
b =
3b + 4b + 2b + 90° = 360 °
9b = 360° - 90°
9b = 270°
dibagi 9
b = 30°
x =
3x - 10 + 2x + 5 = 180°
5x -5° = 180°
5x = 180° + 5°
5x = 185
dibagi 5
x = 37
PSR = 3x° - 10°
= 3(37)° - 10°
= 111° - 10°
= 101°
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