Tlong bantuin dongg,terima kasih

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Tlong bantuin dongg,terima kasih​

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NOMOR 1

Mencari x

4x + 58 + 3x + 73 = 180

7x + 131 = 180

7x = 180 – 131

7x = 49

x = 49/7

x = 7

Besar sudut ABE

= 4x

= 4 × 7

= 28°

Besar sudut DBC

= 3x + 73

= 3 × 7 + 73

= 21 + 73

= 94°

NOMOR 2

Sudut NOK dan MOL sama besar karena saling berhadapan dan tersusun dari dua garis yang sama.

Maka :

3t + 4 = t + 68

3t – t = 68 – 4

2t = 64

t = 64/2

t = 31°

NOMOR 3

1) 2a + 90° + 2a = 180°

4a = 180° – 90°

4a = 90°

a = 90°/4

a = 22,5°

2) a + 3a + 3a + a = 180°

8a = 180°

a = 180°/8

a = 22,5°

3) 3a + 2a + 90° = 360°

5a = 360° – 90°

5a = 270°

a = 270°/5

a = 54°

4) a + 2a + 90° = 180°

3a + 90° = 180°

3a = 180° – 90°

3a = 90°

a = 90°/3

a = 30°

Semoga memantu.


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