Answer:
12. 35 degrees
14. 110 degrees
Step-by-step explanation:
Since DE is equal to EF this triangle is and isosceles triangle. Which tells us that the base angle are equal. Therefore x is 35 degrees.
Triangle DMN is also an isosceles triangle because DM=MN. So, angle MND is 35 degrees. Angles in a triangle add up to 180 degrees so we can create the equation:
DMN+MDN+MND=180
2(35)+DMN=180
DMN=110
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