The ParallelogramOpposite sides are parallel and equal in length, and opposite angles are equal (angles "a" are the same, and angles "b" are the same)NOTE: Squares, Rectangles and Rhombuses are all Parallelograms!Example:A parallelogram with:all sides equal andangles "a" and "b" as right anglesis a square!
-- both have four sides -- both have four angles -- both have at least one pair of parallel sides -- both have two sets of equal angles -- both have names composed of 9 letters -- both have the letters 'r', 'e', 't', and 'a' in their names
There are no angles: the only intersections are of curves.
Classifications by side length or comparison of angles and sides:scalene - no sides or angles equalisosceles - two sides and angles equal (congruent)equilateral - all sides and angles equal (all 60° angles)Classifications by included angles :right triangle - contains a 90° angle (right angle)oblique triangle - has no right angleacute triangle - contains all angles less than 90°obtuse triangle - contains one angle greater than 90°
parallel line and intersecting line, etc.
A square, rectangle, or quadrilateral
The 3 names for this figure are: 1. Square - all sides are parallel, there are 4 right angles, and all the sides are the same length. All squares are quadrilaterals and parallelograms. 2. Quadrilateral - 4 sides. NOT all quadrilaterals are squares, however. 3. Parallelogram - all sides are parallel. NOT all parallelograms are squares, however.
Not exactly. They are two names for the same shape. The typical shape consists of a four-sides figure with opposite sides (and angles) equal. Each pair of parallel sides are the same length.
equal angle
Different pairs of angles have different names.
The ParallelogramOpposite sides are parallel and equal in length, and opposite angles are equal (angles "a" are the same, and angles "b" are the same)NOTE: Squares, Rectangles and Rhombuses are all Parallelograms!Example:A parallelogram with:all sides equal andangles "a" and "b" as right anglesis a square!
They are rhombus and parallelogram.
Quadrilateral, rectangle, square
square or rhombus
a rhombus, a quadrilateral without right angle, a quadrilateral with equal opposite parallel sides but no right angles
Acute angles do not have specific names.
-- both have four sides -- both have four angles -- both have at least one pair of parallel sides -- both have two sets of equal angles -- both have names composed of 9 letters -- both have the letters 'r', 'e', 't', and 'a' in their names