geometric shape with two rays or line segments that meet at a common point all three angles of an angle add up to 180 degrees labeled with the Greek letter ‘alpha’ (α) or the English letter ‘A’ can be acute (less than 90 degrees), right (90 degrees), or obtuse (greater than 90 degrees)
angle which has geometric shape with two rays or line segments that meet at a common point angle which is all three angles of an angle add up to 180 degrees angle which has labeled with the Greek letter ‘alpha’ (α) or the English letter ‘A’ angle which can be acute (less than 90 degrees), right (90 degrees), or obtuse (greater than 90 degrees)