Jawaban:
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Jawaban:
14.a.2y-1+y+9=90°
3y+8=90°
3y=90°
3y=90°-8
3y=82°
y=82°/3
y=27,3°
b.(i).2y-1
=2x27,3+1
=54,6+1=55,6°
y+9
=54,6-9
=45,9°
(iii)Luas segitiga= 1/2 x a x t
2y-1+y+9=1/2 x a x t
3y+8=1/2 x a x t
y=1/2 x 8 x 3
y=1 x 4 x 3
y=12 cm
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