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A straight angle measures 180°. ... An angle can be measured using a protractor, and the angle of measure 90 degrees is called a right angle. In a right angle, the two arms are perpendicular to each other. When the right angle is divided into two equal parts each angle measures 45°.
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True, because Egypt is mostly desert so its population grew along the Nile River because it was a water source. Everywhere else is uninhabited.
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En 1953 determinó con exactitud la edad de la Tierra en 4.550 millones de años, con un margen de error de unos 70 millones de años.
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The big difference between a photograph and maps are that maps shows an illustration of a vertical plan of a region, while a photograph presents a realistic image.
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