pake caranya k...! NO 17

Bab Bangun Datar
Matematika SMP Kelas VII

∠PQR = ∠PSR = a°
∠SPQ = 1/2 x (360° - a° - a°)
∠SPQ = 1/2 x (360 - 2a)°
∠SPQ = 180° - a°

∠SPR = 1/2 x ∠SPQ
∠SPR = 1/2 x (180 - a)°
∠SPR = (90 - a/2)°

jawabannya C