Question

gunakan penjelasan juga TvT (bantu)​

Answer 1

Jawaban:

1) a dan b berpelurus

a = 1/2b

sudut b

a + b = 180°

1/2b + b = 180°

3/2b = 180°

3b = 360°

b = 120°

sudut a

a = 1/2b

a = 1/2 . 120°

a = 60°

2) a dan b berpenyiku

a = 1/2b

sudut b

a + b = 90°

1/2b + b = 90°

3/2b = 90°

3b = 180°

b = 60°

Answer 2

nomor 1

a + b = 180

½b + b = 180

1/2b + 1 = 180

1/2b + 1/1 = 180

1/2b + 2/2 = 180

3/2b = 180

3b = 360

b = 360/3

b = 120

a = ½b

a = ½(120)

a = 1 x 60

a = 60° (c)

nomor 2

a + b = 90

½b + b = 90

3/2b = 90

3b = 180

b = 180/3

b = 60°(c)