properties of semicircle in maths
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In mathematics (and more specifically geometry), a semicircle is a one-dimensional locus of points that forms half of a circle. The full arc of a semicircle always measures 180° (equivalently, π radians, or a half-turn). It has only one line of symmetry (reflection symmetry).
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The angle at the circumference in a semicircle is 90°. Angles in a triangle add up to 180°.
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