tolong donk No 1,2,3,4 yang essay B #MAKAICARA!

1.

x = 180 - (91 + 50)
x = 180 - 141
x = 39

2.

a.
3x + 2x + 4x = 180
9x = 180
x = 180/9
x = 20

b. ABE = 2x = 2(20) = 40

3.

4x + x = 180
5x = 180
x = 180/5
x = 36

4x = 4(36) = 144

4.

a. mungkin soal yg a itu = 25
→ suplemen = 180-25 = 155
→ komplemen = 90 - 25 = 65

b. 75
→ suplemen = 180 - 75 = 105
→ komplemen = 90 - 75 = 15

c. 45
→ suplemen = 180 - 45 = 135
→ komplemen = 90 - 45 = 45

d. 27
→ suplemen = 180 - 27 = 153
→ komplemen = 90 - 27 = 63

e. 33
→ suplemen = 180 - 33 = 147
→ komplemen = 90 - 33 = 57

1.
α+50°+91° = 180°⇔ α + 141°=180°⇔ α =180°-141°= 39°

2. 
a. 2x+4x+3x =180°⇔ 9x =180°⇔ x=180°/9 ⇔ x= 20°
b. <ABE =2x ⇔2(20°)= 40°

3.
besar sudut adalah 4 kali pelurus
karena sudut pelurus adalah 180° maka:
4 × 180° =  360°

4. 
suplemen 
a. 250°⇔ 180°-250° = -70° (?)
b. 75° ⇔ 180°-75° = 105°
c.25° ⇔ 180°-25° = 155°
d.33° ⇔ 180°-33° = 147°

komplemen
a. 250°⇔ 90°-250° = -160° (?)
b. 75° ⇔ 90°-75° = 15°
c.25° ⇔ 90°-25° = 65°
d.33° ⇔ 90°-33° = 57°

semoga membantu