Hi welcome to part two of Math's help geometry! Press the green flag, then read the slide, press space when finished reading that slide continue to click the slides going from A to D (a,b,c and d). When you have reached the screen with a love heart (the final slide) press the background and then you will reach the start again and you can continue to do the same thing if you would like to watch it again.
I worked really hard on this so please put a nice comment down below. By the way it works best in full screen. Part three measurement is next.
