Question

bantu kaka please. makasih​

Answer 1

Jawaban:

1) 18°

2) <BEC = 65°

Penjelasan dengan langkah-langkah:

1)

• <DAC = 3x°
• <CAB = 2x°

Jawab =

• Karena Sudut Siku-Siku , maka total sudutnya 90°

<DAC + <CAB = 90°

3x° + 2x° + 90°

5x° = 90°

x = 18°

2)

• <DEC = 6y + 25°
• <DEA = 3x + 20°
• <CEB = 5x - 10°

Jawab =

• Kita cari nai x dahulu , karena <DEA dan <CEB Bertolak Belakang , kita cari nilai x dari sana

<DEA = <CEB

3x + 20° = 5x - 10°

3x - 5x = -10 - 20

(-2x) = (-30)

x = 15°

<BEC (<CEB) = 5x - 10°

<BEC = 5(15) - 10

<BEC = 75 - 10

<BEC = 65°