tolong saya gak ngerti,pas kmrn saya gak masuk

nomor 1
-------------

→ sudut garis lurus = 180°

Maka :

3a + 5a = 180°
8a = 180°
a = 180° / 8
a = 22,5 °


a). Nilai a = 22,5° ✔

b). Sudut RQS

= 5a
= 5(22,5)
= 112,5° ✔



Nomor 2
---------------

→ Sudut siku siku = 90°

Maka :

2a + 40° = 90°
2a = 90° - 40°
2a = 50°
a = 50° / 2
a = 25°


Nilai a = 25° ✔