Lines Relationshps
two or more straight lines on the same flat surface—called a plane—that stay the same distance apart and never cross or touch, no matter how far they stretch
pairs of angles formed on opposite sides of a transversal line when it intersects two other lines; these angles are congruent
what are alternating angles?
the measure of the sum of the interior angles of a triangle
what is 180 degrees?
a flat, two-dimensional shape made with straight lines that connect to form a closed loop
what is a polygon?
a two-dimensional closed shape with straight sides where the side lengths, the interior angles, or both are not all equal
what is an irregular polygon?
two straight lines that cross or meet each other at a right angle, which measures exactly 90 degrees
what are perpendicular lines?
two angles that sit on the same side of a transversal line and lie between two other lines; these angles are supplementary (add to 180)
what are same side angles?
the measure of the sum of the exterior angles of a triangle
what is 360 degrees?
a flat, closed two-dimensional shape with straight sides where all sides are equal in length and all interior angles are equal in measure
what is a regular polygon?
this is the formula for finding the sum of the interior angles of a polygon
what is (n-2)180?
two or more straight lines that cross or meet each other at a single common point
what are intersecting lines?
pairs of angles that occupy the same relative position at each intersection where a straight line (called a transversal) crosses two other lines; these angles are congruent
what are corresponding angles?
a triangle that contains a right angle
what is a right triangle?
this is the formula for finding the sum of the interior angles of a polygon
what is (n-2)180?
this is the sum of the exterior angles of any pologyon
what is 360?
a straight line that crosses two or more other lines at different, distinct points
what is a transversal line?
one of a pair of opposite angles formed when two straight lines cross; these angles are congruent
what are vertical angles?
a triangle that has exactly two congruent sides and two congruent angles
what is an isocelese triangle?
this is the sum of the exterior angles of any pologyon
what is 360?
what is the measure of the missing angle?
a triangle in which all sides and angles are equal
what is an equilateral triangle?
I get this answer when I divide the sum of the interior angles of a regular polygon by the number of sides the polygon has
what is the measure of each interior angle?
a triangle that has no congruent sides or angles
what is a scalene triangle?
I get this number when I divide 360 by the number of sides the regular polygon has
what is the measure of each exterior angle?
the measure of an exterior angle of a triangle equals the sum of the measures of its two remote (non-adjacent) interior angles
what is the triangle exterior angle theorem?