Pliss tolong jawab butuh banget jawabannya plisss​

Penjelasan dengan langkah-langkah:

SOAL 1

∠A1 + ∠B4 = 180°

(5x + 25) + (3x – 5) = 180°

8x + 20° = 180°

8x = 160°

x = 20°

∠B3 = ∠A1

= 5. 20° + 25°

= 100° + 25°

= 125°

.

.

SOAL 2

(3x + 30) + 2x = 180°

5x = 150°

x = 30°

.

.

∠D = 2. 30° = 60

∠A = 180° – (60 + 45)°

= 180° – 105°

= 75°

penyiku A

= 90° – ∠A

= 90° – 75°

= 15°