Blobbies Achievements
Total achievements: 35
Circle
A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).
Square
A plane figure with four equal straight sides and four right angles.
Equilateral Triangle
A plane figure with three straight sides (equal in size) and three angles (each 60°).
Rectangle
A plane figure with four straight sides and four right angles, especially one with unequal adjacent sides.
Pentagon
A plane figure with five straight sides and five angles.
Rhombus
"A parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
Ellipse
A plane curve such that the sums of the distances of each point in its periphery from two fixed points (the foci) are equal.
Semicircle
Half of a circle; the arc from one end of a diameter to the other.
Trapezoid
A quadrilateral with only one pair of parallel sides.
Scalene Triangle
A triangle that has three unequal sides.
Kyte
A plane figure with straight sides. It has 2 pairs of equal adjacent sides. Each pair is made up of adjacent sides that are equal in length.
Hexagon
A plane figure with six straight sides and six angles.
Rhomboid
A quadrilateral of which only the opposite sides and angles are equal.
Oval
A curve resembling a squashed circle but, unlike the ellipse, without a precise mathematical definition.
Circular Sector
The portion of a disk enclosed by two radii and an arc, where the smaller area is known as the minor sector and the larger being the major sector.
Trapezium
A quadrilateral plane figure of which no two sides are parallel.
Right Triangle
A triangle in which one of the interior angles is 90°.
Lens
A convex set bounded by two circular arcs joined to each other at their endpoints.
Heptagon
A plane figure with seven straight sides and seven angles. Also known as the septagon.
Curvilinear Triangle
A shape formed from the intersection of three circular disks, each having its center on the boundary of the other two.
Annulus
A flat ring-shaped object, a region bounded by two concentric circles.
Arbelos
A plane region bounded by three semicircles connected at the corners, all on the same side of a straight line that contains their diameters.
Stadium
A plane figure constructed of a rectangle with semicircles at a pair of opposite sides.
Acute Triangle
A triangle with all three angles acute (less than 90°).
Deltoid
The trace of a point on a circle, rolling inside another circle that is 3 or 3/2 times as large in radius. Also known as the Tricuspid.
Octagon
A plane figure with eight straight sides and eight angles.
Hippopede
A curve formed by the intersection of a torus and a plane, where the plane is parallel to the axis of the torus and tangent to it on the interior circle.
Lune
The concave-convex area bounded by two circular arcs (while a convex-convex area is termed a lens).
Salinon
A geometrical figure bounded by four semicircles.
Squircle
A closed curve having properties intermediate between those of a square and a circle.
Obtuse Triangle
A triangle in which one of the angle is obtuse (greater than 90° and less than 180°).
Astroid
A hypocycloid (curve generated by the trace of a fixed point on a small circle that rolls within a larger circle) with four cusps.
Nonagon
A plane figure with nine straight sides and nine angles.
Cardioid
A plane curve traced by a point on the perimeter of a circle that is rolling around a fixed circle of the same radius.
Lemniscata
A plane curve with a characteristic shape, consisting of two loops that meet at a central point.
