This wasn't a problem for me in 2.79, but 2.8 is proving an enigma. I can create the first landing pad pentagon and scale it. I can select/deselect the pentagon. But nothing I do seems to extrude the pentagon. I tried edit mode and E but it doesn't work. I tried numerous other commands, none of which work. Here's my screen:
Hey vvndep , you do need to be in Edit mode like you guessed. You'll also need to be in edge or vertex select mode since there are no faces at the moment to extrude from. Hope that helps!