Determining Unknown Sides and Angle Measures of Quadrilaterals

Find the value of x.

Remember, the sum of all angles in a Quadrilateral is 360 degrees!

• x = 115 degrees

• x = 90 degrees

• x = 65 degrees

• x = 70 degrees

Find the value of angle (y) ?

• 145

• 134

• 35

Find the values of x, y, and z. (figures aren't drawn to scale very well!)

• x = 29, y = 73, z = 82

• x = 29, y = 29, z = 102

• x = 78, y = 78, z = 29

• x = 29, y = 73, z = 102

• 135

• 55

• 180

• 360

Find the value of x.

• x = 90 degrees

• x = 81 degrees

• x = 124 degrees

• x = 65 degrees

Three angles of a quadrilateral are 110, 120 and 50.  What is the measure of the 4th angle?

• 60

• 70

• 80

• 130

Find the value of angle (Z) ?

• 145

• 134

• 35

Which could be the fourth angle of a quadrilateral with angles of 35^o, 112^o, and 90^o?

• 57^o

• 123^o

• 35^o

• 112^o

A quadrilateral has angles that measure 19 degrees. 109 degrees, and 67 degrees. What is the measure of the remaining angle?

• 165 degrees

• 95 degrees

• 90 degrees

• 360 degrees