Which of the following sentences are statements? Give reasons for your answer.
The sum of all interior angles of a triangle is $180^{\circ}.$
The sum of all interior angles of a triangle is $180^{\circ}.$
(A) sentence is considered a statement in logic if it is either true or false,but not both.
The sum of all interior angles of a triangle is $180^{\circ}$ is a universally accepted geometric fact,which is always true.
Therefore,this sentence is a statement.
The sum of all interior angles of a triangle is $180^{\circ}$ is a universally accepted geometric fact,which is always true.
Therefore,this sentence is a statement.
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