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## Answers

sum of angles in a quadrilateral=360

x+x+x+x=360

4x=360

x=360/4

x=90

therefore each angle measuers 90°

**all angles are equal in a quadrilateral**

required to be proved :

**measure of each angle**

solution :

**let each angle be " x " because all the angles are equal**

**the sum of the angles of the quadrilaterals is 360**

**x + x + x + x = 360°**

**4x = 360°**

**x = 360° / 4**

**∴ x = 90°**

the measure of each angle in the quadrilateral is 90°

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