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°