4 years ago

Please help ............

Mathematics

1 answer:

Kazeer [188]4 years ago

8 0

Answer:67 degrees

Step-by-step explanation:

A quadrilateral is 360 degrees. You have 1 angle. Look at the left and right sides. If they're the same, then the opposite angles are congruent. Since they're congruent, that would mean the angle between 10.4 and 20.8 is 113. Since the angle opposite of x is the same as x, we could solve now. We make an equation

2x+113+113=360

x=67

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Please help ............​

Please help ............