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: an angle less than 90 degrees
: the space between two intersecting lines that share the same endpoint
: the point off the base of a pyramid where the triangular sides meet
: the number of square units needed to completely cover a 2-d shape
: the bottom face of a solid
a perfectly round 2-d figure. All points on a circle’s outline (the circumference) are the same distance from the centre.
: the perimeter of a circle
: turning in the same direction as the hands of a clock around a clock face
: a tool for drawing circles
: two angles that measure 90 degrees in total
a 3-d solid with one circular base, and one vertex (apex), and a curved surface all around
: geometric shapes that have the same size and shape
: opposite of clockwise
: a special rectangular prism made of 6 equal squares
: bent not straight as in the outline of circles or some surfaces found in cylinders, cones, etc.
: a solid shaped like a tube with two circular bases and a curved surface all around.
: a ten-sided polygon
: a unit for measuring the size of an angle (one full turn is 360 degree)
: a straight line segment whose endpoints are on the circle and its middle is the centre of the circle
: a twelve-sided polygon
: the line on a 3-d solid where two faces meet
: refers to a polygon whose sides are equal in length
a triangle with all sides equal
: a flat surface of a polyhedron surrounded by edges
: a board with a number of pegs. Elastic bands are wrapped around the pegs to make polygons in order to study their properties (perimeter, area, angles, etc.)
: a branch of mathematics that studies points, lines, angles, shapes, solids, etc.
: a seven-sided polygon
: a six-sided polygon
: a prism with
8 faces (2
hexagonal and 6 rectangular)
, 18 edges, and 12 vertices.
: a pyramid with a hexagonal base and six triangular faces that meet at the apex.
: angles on the inside of a shape
: two different lines that cross one another and share only one point (at their intersection)
isometric dot paper
: a paper with dots that are equally spaced apart
: a triangle with two equal sides
: a quadrilateral with 2 pairs of equal sides. Each pair is adjacent (side by side and sharing a point)
line of reflection
: a line used to reflect or flip a shape
line of symmetry
: a central dividing line that creates two congruent halves, which are reflection of each other
: an outline that can be folded up to build a 3-d model of a solid
: an nine-sided shape
: an angle that measures between 90 and 180 degrees
: an eight-sided shape
a solid with 10 faces (2 octagonal and 8 rectangular), 24 edges, and 16 vertices.
: a pyramid with 1 octagonal base and 8 triangular faces that meet at the apex.
: a round shape that looks like a circle that has been stretched
: lines that run side by side and never intersect nor get closer or farther
: a quadrilateral whose opposite sides are parallel
: a five-sided shape
a solid with 7 faces (2 pentagonal and 5 rectangular), 15 edges, and 10 vertices.
: a pyramid with a pentagonal base and five triangular faces that meet at the apex.
: the distance around a closed shape
: at right angles, forming a 90 degrees angle
: a closed shape that is made of at least 3 side
: a 3-d solid with polygons as its faces
: a solid with two congruent, parallel bases and rectangular sides
: a tool for measuring angles
: a solid that has one base and a set of triangles as its sides, which slope to meet at a single point (apex) above the base
: any four-sided polygon
: the distance between the center of a circle and any point on the circle
: a quadrilateral which has 4 right angles
a solid with 6 rectangular
, 12 edges, and 8 vertices.
: a pyramid with a rectangular base and four triangular faces that meet at the apex.
: an angle greater than 180 degrees, but less than 360
: a vertex of a polygon that forms an interior angle greater than 180 degrees
: a polygon whose sides and angles are all equal (e.g., square)
: a parallelogram with four equal sides
: a 90 degrees
: a triangle that has a right angle
: a trapezoid with two right angles
: a triangle with no equal sides
: half of a circle
: a 3-d solid that looks like a ball
: a special quadrilateral with 4 equal sides and 4 right angles
: a pyramid with a square base and four triangular faces that meet at the apex.
: an angle that measures180 degrees
: two angles that measure 180 degrees in total
: a shape having two halves which are mirror images of each other
: a repeating pattern of shapes that cover a surface without overlapping the shapes or leaving any gaps
: a quadrilateral that has only one pair of parallel sides
: a three-sided polygon
a solid with 5 faces (2 triangular and 3 rectangular), 9 edges, and 6 vertices.
a pyramid with 4 triangular faces, 6 edges and 4 vertices.
): an eleven-sided shape
: the point where two sides of a polygon meet, or the point where three or more edges of a polyhedron meet
: more than one vertex
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