jika sudut A = 2/5 sudut B. hitunglah. a. M sudut A dan M sudut B jika keduanya saling berpelurus ! b. selisih M sudut A dan M sudut B , jika kedua sudut saling

A = 2/5 B

a.
A + B = 180°
2/5 B + B = 180°
7/5 B = 180°
B = 180° × 5/7
B = 900°/7
B = 128 4/7

A + B = 180
A + 128 4/7 = 180
A = 52 - 4/7
A = 51 3/7

b.
A + B = 90°
2/5 B + B = 90°
7/5 B = 90°
B = 450/7
B = 64 2/7

A + B = 90
A + 64 2/7 = 90
A = 26 - 2/7
A = 25 5/7

selisih:
B - A
= 64 2/7 - 25 5/7
= 38 4/7