Tolong dong kak.. yang ini gimna ya ?​

Jawaban:

C

C

Penjelasan dengan langkah-langkah:

1) 180° – (90 + 40)°

= 180° – 130°

= 50°

180° – 105° = 75°

180° – (90 + 75)°

= 180° – 165°

= 15°

x = 180° – (50 + 15)°

= 180° – 65°

= 115°

2) (7x + 8) + (5x + 4) = 180°

12x + 12 = 180°

12x = 168°

x = 168° ÷ 12

= 14°

besar ∠PQR

= 7x + 8

= 7. 14° + 8

= 98° + 8

= 106°