Question

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Answer 1

1. 60°

2.60°

3.60°

4. Equilateral triangle

Explanation

According to angle sum property of ∆,

4x° + (2x+30°) + (5x - 15°) = 180°

11x° + 15 = 180°

11x° = 180°- 15°

11x° = 165°

x° = 15

Now,

1st angle = 4x = 4×15 = 60°

2nd angle = 2x + 30 = 30 + 30 = 60°

3rd angle = 5x - 15 = 75 - 15 = 60°

Since,all angles are equal hence the given ∆ is an equilateral triangle.

Answer 2

Answer:

is your answer my dear

Step-by-step explanation:

1. 80°
2. 50°
3. 70°
4. scalene