Tolong bantuannya pleaseee​

Penjelasan dengan langkah-langkah:

1.

∠ABD + ∠CBD = 180°

3a° + a° = 180°

4a = 180°

a = 180° : 4

a = 45°

2.

∠DEH + ∠HEG + ∠GEF = 180°

b° + b° + b° = 180°

3b° = 180°

b = 180° : 3

b = 60°

3.

∠SQP + ∠SQC = 180°

3c + 45° + 30° = 180°

3c + 75° = 180°

3c = 180° – 75°

3c = 105°

c = 35°

4.

∠KLN + ∠MLN = 180°

4d + 60° + d = 180°

5d + 60° = 180°

5d = 180° – 60°

5d = 120°

d = 24°

5.

∠x = 35°

∠DAC + ∠BAC = 90°

x + y = 90°

35° + y = 90°

y = 90° – 35°

y = 55°

y = 55°

6.

a.

∠ABE = 90° (Sudut siku-siku)

∠ABE + ∠EBD + ∠CBD = 180°

90° + p° + 36° = 180°

p° + 126° = 180°

p° = 180° – 126°

p° = 54°

b.

∠DBA = ∠ABE+ ∠EBD

= 90° + 54°

= 144°

7.

a.

∠PQT = 90° (Sudut siku-siku)

∠PQT + ∠SQT + ∠RQS = 180°

90° + 38° + 2q° = 180°

2q° + 128° = 180°

2q° = 180° – 128°

2q° = 52°

q° = 26°

b.

∠RQS = 2q

= 2(26)°

= 52°