Question

If three angels of a Quadrilateral are 60°, 45° and 100° then find the 4th angle​

Answer 1

Answer:

the fourth angle is 155°

Step-by-step explanation:

Let the fourth angle be x°

since, sum of angles of a quadrilateral is 360°

therefore,

60°+45°+100°+x° = 360°

205°+x° = 360°

x° = 360°- 205°

x°=155°

hope this helps

Answer 2

$\huge\cal\red{\underbrace{Solution:}} \\ \\ \text{We know that :} \\ \text{quadilateral angle = 360°} \\ \\ \text{Let the 4th angle be x, then} \\ \\ \text{60° + 45° + 100° + x° = 360°} \\ \text{105° + 100° + x° = 360°} \\ \text{205° + x° = 360°} \\ \text{x° = 360° - 205°} \\ \\ \text{Therefore, x = 155°} \\ \text{Fourth angle = 155°} \\ \\ \text{Hope it will help you...}$