Respuesta :

Angles can be either straight, right, acute or obtuse. An angle is a fraction of a circle where the whole circle is 360°. A straight angle is the same as half the circle and is 180° whereas a right angle is a quarter of a circle and is 90°. You measure the size of an anglewith a protractor.

Type of Angle Size in Degrees

Acute Angle        Less than 90°

Right Angle         Exactly 90°

Obtuse Angle         Larger than 90° and less than 180°