Angles such as 30deg 45deg 60deg 90deg 180deg etc that can be used as. National Performance Levels Imagine Maths national performance levels consist of 5 classifications and. A benchmark is established allowing someone to compare various things or attempt to determine the difference between things.
We also call them friendly numbers.
Benchmark angles are angles like 45 60 90 and so on that have exact trigonometric ratios. Used as a reference point in surveyingAbbreviation. Heres a list of benchmark numbers. A benchmark number is any multiple of 10 100 and sometimes multiples of 25.