This is the Hypsometer ( Similar Triangles Concept-based project ). It's very useful for children who are doing maths projects for any exhibition. It's used with the concept of Similarity property. Complete Logic behind this Hypsometer ( Similar Triangles Concept-based project ) was explained in this video ( Hypsometer ( Similar Triangles Concept-based project ) Video Duration: 8 minutes with 132mb MP4 Format only ) In your contribution, a 90% amount will be used for Poor Children Education. AKSHARA FOUNDATION For ORPHANS(Support Us)