Find the mean 9,1,8,3,2,1 graphically.

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

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

How can you construct perpendicular lines and prove theorems about perpendicular lines