It sounds like you are thinking of a protractor. We still use it a lot today, especially in architecture and design. The protractor is a semi-circular measuring instrument used for measuring angles.
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Honey, measuring the width of a triangle is as easy as measuring the distance between two of its sides. Just whip out your ruler or measuring tape, line it up perpendicular to the base, and boom, you've got your width. No need for fancy math or geometry tricks here, just good old-fashioned measuring.
Old math teachers never die they just reduce to lowest terms
it depends on what the confersation is like if it's math, you can say do you like math? and he will say his answer and then you say yours. and you can talk like that