Find the missing value and please show how

Angle DCG is supplementary with angle DCE that is DCE is 180 - 86 = 94.

The sum of angles CDE, DCE, CED must equate to 180 since they describe a triangle, CDE = 35, DCE = 94 and thus CED = 180 - 35 - 94 = 51.

So the answer is 51.

Hope this helps.

a line is an defined derm because it

a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.