Diketahui dua buah sudut .sudut A =(2×+7) dan sudut B (2×-5) membentuk sudut siku siku besar kedua sudut tersebut berturut turut adalah
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Jawab:
∠A = 51° dan ∠B = 39°
Penjelasan dengan langkah-langkah:
A + B = 90°
2x + 7° + 2x - 5° = 90°
4x + 2° = 90°
4x = 90° - 2°
x = 88° : 4
x = 22°
Sudut A
= 2x + 7°
= 2 . 22° + 7°
= 44° + 7°
= 51°
Sudut B
= 2x - 5°
= 2 . 22° - 5°
= 44° - 5°
= 39°
∠A = 51° dan ∠B = 39°