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a plane figure with at least three straight sides and angles
What is a polygon?
sides or segments that have the same exact length
What is congruent?
the quality of being made up of exactly similar parts facing each other or around an axis
What is symmetry?
a plane figure with ten straight sides and angles
What is a decagon?
a four-sided plane rectilinear figure with opposite sides
What is a parallelogram?
a plane figure with three straight sides and three angles
What is a triangle?
one of the internal angles are obtuse
What is an obtuse triangle?
every part has a matching part
What is point symmetry?
a curve that does not cross itself
What is a simple curve?
a plane figure with four equal straight sides and four right angles
What is a square?
a plane figure with six straight sides and angles
What is a hexagon?
a triangle that has all equal sides
What is an equilateral triangle?
an outline or surface curved like the exterior of a circle or sphere
What is convex?
a triangle that contains one right angle
What is a right triangle?
when a shape still looks the same after some rotation
What is turn symmetry or rotational symmetry?
a plane figure with nine straight sides and nine angles
a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides
What is an isosceles trapezoid?
a polygon with four edges and four vertices
What is a quadrilateral?
a triangle that has three unequal sides
What is a scalene triangle?
an outline that curves inward like the interior of a circle
What is concave?
a plane figure with twelve sides
What is a dodecagon?
a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides
What is a rhombus?
a plane figure with seven straight sides and angles
What is a heptagon?
a quadrilateral with only one pair of parallel sides
What is a trapezoid?
a plane figure with five straight sides and five angles
What is a pentagon?