Think about a scenario or 'real-life' situation where you could use algebra to
model it.

Ill mark the brainliest if you me with the these three questions 7,8,9

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.