Facts About Alternate Interior Angles

Therefore the interior angles of a triangle add up to 180.

Facts about alternate interior angles. Angles basics 3 comparing angles to right angles 4 estimate measure and compare angles using degrees 5 angles on a straight line 6 angles on a point 6 vertically opposite angles 6 classifying triangles and describing quadrilaterals 7 angle sum of a triangle 7 parallel lines 7 corresponding alternate and co interior. Angles in a triangle add up to 180 and in quadrilaterals add up to 360. Alternate interior angles are angles that are on the inside of the two lines and on the opposite sides of the transversal.

When two lines are crossed by another line called the transversal alternate interior angles are a pair of angles on the inner side of each of those two lines but on opposite sides of the transversal. Learn about alternate interior angles. Facts about alternate interior angles.

Arrowheads show lines are. The lines are parallel if alternate interior alternate exterior or corresponding angles are congruent. The consecutive interior angles theorem states that if two parallel lines are cut by a transversal then consecutive interior angles are supplementary 180 what is the alternate interior angles theorem.

We know that the angle on a straight line on a straight line is 180 so we can say that x y z 180. Adjust the lines and convince yourself of this fact. Parallel lines in shapes can form corresponding and alternate.

Alternate exterior angles are congruent if the lines intercepted by the transversal are parallel. Interior angles of a quadrilateral. Angles acute obtuse reflex right angle alternate corresponding interior exterior supplementary opposite adjacent angle.

Learn about and revise angles lines and multi sided shapes and their properties with this bbc bitesize gcse maths edexcel study guide. Corresponding angles lie in the same position at each intersection. Angles can be calculated inside semicircles and circles.