A rectangular pyramid has a height of 10 meters. The base measures 8 meters in length and 12 meters in width. Two different trangular cross sections are formed throug the vertex and perpendicular to the base . What is the difference in the areas of the cross-sections I have not do geomerty for 50 years and when I came up with 30 M 2 and I had the answer verifed but when my grandaughter gave answer to her computer questioner she gave 20 M 2 and the computer gave 100 how could there be 2 answers