Satellite Tours is taking a group of 32 students and 6 adults on a tour of historical sites in the city. Each Satellite Tours van will hold 9 passengers. What is the least number of vans that are needed to take all of the students and adults?

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