A physics class conducted an experiment comparing the period of a pendulum to the length of the pendulum. The results of the experiment are given in the table below. Use regression to find the mode of the data given. What was the value of a in the model of data? Round your answer to two decimal points.

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