Question

explain and write the steps please.​

Answer 1

Step-by-step explanation:

In a) x + 3x + 2x = 180°. { Linear Pair }

6x = 180°

x = 180°/6

x = 30°

1st angle x = 30°

2nd angle 3x = 30°×3

= 90°

3rd angle 2x = 30°×2

= 60°

In b) (3x - 7)° + 55° + (x + 20)° = 180°. {Linear pair}

3x - 7 + 55 + x + 20 = 180

4x + 68 = 180

x = 180 - 68/4

x = 28°

1st angle (3x - 7) = 3×28 - 7

= 77°

2nd angle = 55°

3rd angle (x + 20)° = 28 + 20

= 48°

In c) x + 30° + x + 40° + 2x + 10° = 180°. {linear pair}

4x + 80° = 180°

x = 180 - 80/4

x = 25°

1st angle = x + 30°

= 25 + 30

= 55°

2nd angle = x + 40°

= 25 + 40

= 65°

3rd angle = 2x + 10°

= 2 × 25 + 10

= 60°

I hope this will help you!

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