What do parallel lines mean on a triangle?
If a line parallel to one side of a triangle intersects the other two sides of the triangle, then the line divides these two sides proportionally..
What two angles add up to 180 degrees?
Two angles are called complementary when their measures add to 90 degrees. Two angles are called supplementary when their measures add up to 180 degrees.
What do you call 3 angles that add up to 180?
In a triangle, the three interior angles always add to 180°: A + B + C = 180°
Are Z angles equal?
Corresponding angles The two angles marked in each diagram below are called alternate angles or Z angles. They are equal.
What is the Z rule?
Alternate angles form a ‘Z’ shape and are sometimes called ‘Z angles’. a and b are adjacent angles. Adjacent angles add up to 180 degrees. … These add up to 180 degrees (e and c are also interior).
What is the F rule in angles?
Angles of Parallel LinesNAMERULECorresponding angles(F shape)Co-interior anglesAdd to 180 degrees (U shape)Alternate anglesEqual (Z shape)
What angle equals 180 degrees?
acute angle-an angle between 0 and 90 degrees. right angle-an 90 degree angle. obtuse angle-an angle between 90 and 180 degrees. straight angle-a 180 degree angle.
Do all angles equal 180 degrees?
In a Euclidean space, the sum of angles of a triangle equals the straight angle (180 degrees, π radians, two right angles, or a half-turn).
What are the 7 types of angles?
Types of Angles – Acute, Right, Obtuse, Straight and Reflex…Acute angle.Right angle.Obtuse angle.Straight angle.Reflex angle.