Triangles have 3 interior angles that measure 180 degrees total.
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A triangle has 3 interior angles which have a sum of 180 degrees
A triangle has three interior angles, adding up to 180 degrees.
The interior angles of a triangle all add up to 180 degrees.
The 3 interior angles of any triangle add up to 180 degrees
The 3 interior angles of a triangle add up to 180 degrees