Page 290 - DK Children's Encyclopedia

Flat shapes KEY Solid shapes
Flat, or 2-D, shapes have Equal angles Solid, or 3-D, shapes have
length and width but no depth. Right angle depth as well as length
Triangles have three straight Equal sides and width.
sides, and quadrilaterals have Equal sides
four straight sides.

Cube
A cube has 12
edges of equal
length and six
faces of equal size.
Equilateral triangle Scalene triangle
All three sides and all three All three sides and all three
angles in an equilateral angles in a scalene triangle
triangle are equal. are different.
Pyramid
The right angle A pyramid can
is always have a triangular
opposite the base, as seen here,
longest side. or a square base.
A triangular-based
pyramid has
four faces and
six edges.
Isosceles triangle Right-angled triangle
An isosceles triangle has two A right-angled triangle has
sides of equal length and one right angle, but the other
two angles of equal size. angles and sides vary.
Cone
Cones have two
faces and only one
edge. The point is
above the center of
the circular base.

Square Rectangle
All four sides in a square are A rectangle has two pairs of
of equal length and all four sides that are the same length
angles are right angles. and four right angles.
Cylinder
A cylinder has
three faces and
two edges. The
two circular faces
are opposite
each other.

Parallelogram Rhombus
A parallelogram has two pairs All the sides in a rhombus are
of sides that are equal length equal length and it has two
and two pairs of angles that pairs of angles of equal size.
are the same size.

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