Choose the large square with a cone triangle on the left side of it and underneath of it is a triangle sideways
page3-25.png page7-248.png page5-179.png page7-158.png
page4-248.png page7-248.png page7-158.png page6-122.png page5-43.png page5-107.png page3-25.png page3-139.png page5-179.png page2-165.png
Not that one instead let's choose the piece that looks like a sideways letter C block letter style with the triangle on the back