hello

i have recieved a part yesterday that might seemed an easy task , but the reliabilty was challenging for me , the requester wants to confirm an addition of 0.3 raw matterial on a surface , and also provided screenshot from the cadia showing the nominal distance between the top of the squaure surface (2mm length) and it ground surface , i did two things , first i measured the plane around that square then another plane on top of it and clicked measure distance , but since the planes are tilted to each other , i measured a point on top of it then created a projection point from both the plane and the top point then selected measure distance between that constructed point and the original points , ended getting close results and even lower value than nominal , what did i do wrong and what is the reliable way to compare to offset surfaces

i have recieved a part yesterday that might seemed an easy task , but the reliabilty was challenging for me , the requester wants to confirm an addition of 0.3 raw matterial on a surface , and also provided screenshot from the cadia showing the nominal distance between the top of the squaure surface (2mm length) and it ground surface , i did two things , first i measured the plane around that square then another plane on top of it and clicked measure distance , but since the planes are tilted to each other , i measured a point on top of it then created a projection point from both the plane and the top point then selected measure distance between that constructed point and the original points , ended getting close results and even lower value than nominal , what did i do wrong and what is the reliable way to compare to offset surfaces

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