My question is in the picture attached below, thank you. Ps: I need full explanations of the answers as said by the instructions. Thanks

Franco wants to double the volume of the cone. what should he do?

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

Alogical argument that is presented in graphical form using boxes and arrows is called?