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===Name of the activity===
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'''Two adjacent angles''' are said to be '''form''' a '''linear pair''' of '''angles''', '''if''' their non-common arms are '''two''' opposite rays. '''Linear pair axiom''' of theorems are '''if a ray stands on a line''' , '''then the sum of two adjacent angles so formed is 180 degree'''
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Brief blurb describing what the activity. If this has been borrowed from some external web site (for example, a non OER or OER site which had this idea and based on which the activity was developed)
=== Objectives ===
=== Objectives ===