Geometry Terms
I am straight and extend in both directions with no ends.
what is a line?
A part of a line that has a fixed starting and end point.
What is a line segment?
A three-sided polygon.
What is a triangle?
The specific name for a 3-sided polygon that includes one right angle.
What is a right triangle?
A quadrilateral that has two pairs of parallel sides.
What is a parallelogram?
A part of a line that has a fixed starting point with no end point.
What is a ray?
A 2D shape with straight sides that is closed.
What is a polygon?
The geometrical term for the shape of a stop sign.
What is an octagon?
The specific name for a triangle that has 3 angles that are all less than 90 degrees.
What is an acute triangle?
A 4-sided polygon that has only one pair of parallel sides.
What is a trapezoid?
I am an angle that is greater than 90 degrees.
What is an obtuse angle?
Two names for an angle that is exactly 90 degrees.
What is a right or a square angle?
A famous government building in Washington DC has this geometrical name because it has 5 sides.
What is the pentagon?
The size (in degrees) of the 3rd angle of a triangle if the first two angles measure 90 and 30 degrees.
What is 60 degrees?
A parallelogram that has all four sides the same length.
What is a rhombus (or a square)?
The term for two lines (or line segments) that never (or would never) intersect.
What are parallel lines?
An angle that is less than 90 degrees.
What is an acute angle?
Two names for any four-sided polygon.
What is a quadrilateral or a quadrangle?
The number of degrees that the interior angles of all triangles add up to.
What is 180 degrees?
Certain parallelograms are called rectangles when they include this specific feature.
What are four (or all) right angles?
A shape formed by two lines, line segments, or rays (or any combination of the 3) diverging from a common point.
What is an angle?
The term when two lines, line segments, or rays intersect and create angles that are exactly 90 degrees.
What is perpendicular?
The name for any six-sided polygon.
What is a hexagon?
The specific name for a triangle that has identical sides (and therefore identical angles).
What is an equilateral triangle?
Besides being a certain type of polygon, quadrilateral, parallelogram, and rhombus, a square is also a certain type of this shape.
What is a rectangle?