6.

Jawaban:

C. 125°

Penjelasan dengan langkah-langkah:

AEF = BFG

Jadi sudut BFG + sudut GFC = 180° karena dlm garis lurus (garis lurus membentuk sudut 180°)

Kita masukkan…

Karena sudut AEF = sudut BFG

AEF + GFC = 180°

(4x – 7)° + (x + 22)° = 180°

4x + (-7) + x + 22 = 180

4x + x + (-7) + 22 = 180

5x + 15 = 180

5x = 180 – 15

5x = 165

x = 165/5 = 33.

Lalu masukan x = 33 dlm sudut AEF

(4x – 7)° = (4.33 – 7)°

(132 – 7)° = 125°

So beaar sudut AEF = 125°