1.

The measures of the three angles of a quadrilateral are 65, 75 and 85. The measure of the fourth angle is 1 point 65 75 85 135

Answer»

Answer:

135

Step-by-step explanation:

LET 4th angle = a

the SUM of the ANGLES of QUADRILATERAL = 360

=> 65+75+85+a = 360

=> 225+a = 360

=> a = 360-225 = 135



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