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(3, or peopendiculan, It is an instorument used to doraw Parallel, Lines. A T-squasre is made up of hard quality coood. 34, Consist of two ports :- the stoke on a the blade. 4 is, in T-shape., (2-)Set Square-, It is used to draw lines parallel, perpendicular of imclimad, limes, Too farmos f set squares are in ginl, i) 30-6ö set square:-, 9t is used to doracw lines of 30, 6o and go, A set square, is shape of sight angle-, lii) 45 set square :-, 4 is used to doracw dine at, these set square ( both). These set, shape., use., 46' and go caith the help of, squeere is, triangulan