Your question is unclear but one instrument for measuring angles is a protractor.
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50x50x5mm sleel angle per meter lenth in weight kilo gramm ?
4.5 kg
Oh, dude, you're hitting me with the math questions now? Alright, let's see... So, if we have a 1.5 degree angle over 1 meter, you'd use some trigonometry magic and find out it falls about 26.2 millimeters. But hey, who's really counting, right? Like, just eyeball it and call it a day.
Use the cosine ratio: 5.437846722 meters
MA = 5 / 0.75 = 6.67 Essentially, its the reciprocal of the sin of the ramp angle