A 2D diagram that can be folded to make a 3D shape with no gaps or overlap.
net
song song
parallel
How many degrees in a right angle?
90 degrees
A 5-sided polygon
pentagon
An 8-sided polygon
octagon
A 6-sided polygon
hexagon
Hình bình hành
Parallelogram
Four sides, four right angles, four lines of symmetry, all sides are equal in length.
square
hình khối tứ diện (4 mặt)
tetrahedron
How many degrees in half a right angle?
45 degrees
A quadrilateral that has two pairs of lengths that are parallel to each other; opposite sides are equal in length, no right angles, no lines of symmetry.
Parallelogram
A 7-sided polygon
heptagon
The direction that hands move on a clock. (clockwise / anti-clockwise)
clockwise
Two lines that are the same distance apart all along their length, the two lines never cross.
parallel
A 3D shape with 4 triangular faces
tetrahedron
A triangle with all three sides the same lenghth, all three angles are equal.
regular triangle
Four sides, four right angles, two lines of symmetry, two opposite sides are equal in length.
rectangle