Question

Tolong kak 8,9,10 bsk dikumpul pake cara ya kak
tolong
plizz kakk

Answer 1

8. 5x + 25° + 3x -5 ° = 180°
5x + 3x = 180° + 5° -25°
8x = 160°
x = 160°/8
x = 20°
B3 = A1
B3 = 5x + 25°
= 5(20)° + 25°
= 100° + 25°
= 125° [ B ]

9. 3x + 30° + 2x = 180°
5x = 180° - 30°
5x = 150°
x = 150°/5
x = 30°
<A = 180° - <B - <C
= 180° - 45° - 2x
= 135° - 2(30)°
= 135° - 60°
= 75°[A]

10. <6 = 180° - 110° = 70°
<5 = <1 = 95°
<3 = 180° - 70° - 95 ° = 15° [B]