tolong dijawab ya kak sama caranya

P1 + P2 + P3 = 180
128 + x + x = 180
2x = 52
x = 26 ( P2 dan P3 )
R2 = R1 = P2 + P3
R2 = R1 = 52
R3 = 180 - ( 2. 52 )
R3 = 76

R1 = R2 kita misalkan x,
P2 = P3 kita misalkan y

P1 + P2 + P3 = 180
128 + y + y = 180
2y = 180 - 128
2y = 52
y = 26

jadi P2 dan P3 = 26

R1 = P2 + P3
X = 26 + 26
X = 52

R1 dan R2 = 52

R1 + R2 + R3 = 180
52 + 52 + R3 = 180
R3 = 180 - 104

R3 = 76