Question

6. The three interior angles of a quadrilateral measure 128°, 88° and 94º. Find the fourth angle.​

Answer 1

Step-by-step explanation:

Sum of interior angles of a quadrilateral = 360°

given three angles 128° , 88° and 94°

let the fourth angle be 'x'

128 + 88 + 94 + x = 360

310 + x = 360

x = 360 - 310

x = 50

so the fourth angle is 50°

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Answer 2

Answer:

sum of quadrilateral angle is 360

then, sum of given three angles

so, 128+88+94=310

fourth angle  =360-310

                      =50

Step-by-step explanation: