Question

write any three Properties of Quadrilateral and also find the fourth angle of a quadrilateral if three angles of quadrilateral are 75 degree 90 degree and 75 degree​

Answer 1

The sum of four angles of quadrilateral = 360 °

angle 1 + 2 + 3 + 4 = 360°

75° + 90° + 75° + x = 360°

240 + x = 360°

x = 360 - 240

x = 120 °

Answer 2

Answer:

120°

Step-by-step explanation:

Properties

• Quadrilateral has 4 sides
• It has 4 vertices and 4 angles
• Sum of the 4 angles will be equal to 360°

4th angle

Let the 4th angle be ' x '

From 3rd point,

=> 75 + 90 + 75 + x = 360

=> 240 + x = 360

=> x = 360 - 240

=> x = 120