3D Shapes ■Geometry■3D Shapes Want more content like this? Access over 6,000 exclusive items. Members only. $4.16/month when paid annually $8.99/month Mar 10, 20150 comments A 3D pyramid printable for children who are studying geometry. See if your child can tell you how many triangles are in the pyramid. For a greater challenge, have your child measure some of the angles and discuss their findings. Get it now!