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What letter is used to indicate the measure of an angle?
I
What is the nth term in math?
An arbitrary term, or placeholder. It is used in general proofs to indicate 'up to whatever desired maximum term'.
What are the greek leters in math?
Pi ( π ) - used in geometry: ratio of cirle's circumferenct to diameter.Theta (θ) - symbol used in trigonometry, to indicate an angle measurement in degrees.Sigma (Σ) - used in math for summation of a series.Delta (Δ) - used to indicate a change in something.There may be others that I haven't listed. There are many more Greek letters used in the different science fields. Hope that helps.
What instrument is used to measure on angle?
A protractor can be used to measure an angle.
What is the matching angle mark to indicate which angles are congruent For line AB and CD?
To indicate that angles are congruent, matching angle marks such as arcs or hash marks are typically used. For angles formed by lines AB and CD, you would place the same number of arcs or hash marks in each angle that you want to show as congruent. For example, if angles ∠1 and ∠2 are congruent, you might place one arc in both angles to signify their equality.
