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We will show you the basic types of angles and explain their properties in a little more detail. Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees. For more videos and interactive exercises, visit https://cs.khanacademy.org The Khan Academy is responsible for Czech translations. Want to help us? Sign up here: https://cs.khanacademy.org/contribute Follow us on social media! Facebook: / khanovaskola Twitter: / khanovaskola Original: • Acute right and obtuse angles Angle...