Download Slides - Nuffield Foundation

Name the Shape
circle
pentagon
square
rectangle
hexagon
triangle
octagon
Triangle Names
A triangle has 3 sides and 3 angles
c
a
60°
a
b
The angles and sides of this
triangle are all different.
It is a scalene triangle.
a + b + c = 180°
60°
60°
Equilateral triangles
have
3 equal sides and
3 equal angles.
a
Isosceles triangles
have
2 equal sides and
2 equal angles.
Triangle Names
c
90°
This is a
right-angled
triangle.
One angle is 90°.
a
b
This is an
acute-angled
triangle.
a, b and c are
all acute angles
less than 90°
obtuse
angle
This is an
obtuse-angled
triangle.
One angle is obtuse
greater than 90°
Quadrilaterals
A quadrilateral has 4 sides
and 4 angles.
It can be split into 2 triangles.
The sum of the angles of any
quadrilateral = 2 x 180° = 360°.
p
q
r
s
p + q + r + s = 360°
Special Quadrilaterals
These are trapezia
Trapezium
One pair of sides parallel
Special Quadrilaterals
These are parallelograms
a
b
a
b
Parallelogram
Opposite sides parallel
Opposite sides equal
Opposite angles equal
Special Quadrilaterals
These are rhombuses
Rhombus
Parallelogram with all sides equal
Unequal diagonals
Diagonals perpendicular
Special Quadrilaterals
These are rectangles
Rectangle
Parallelogram with
perpendicular sides
Diagonals equal
Diagonals not perpendicular
Special Quadrilaterals
These are squares
Square
Rectangle with all sides equal
Diagonals equal
Diagonals at right angles
Special Quadrilaterals
These are kites
Kite
Two pairs of adjacent sides equal
Unequal diagonals
Diagonals at right angles
Pentagons
A pentagon has 5 sides
and 5 angles.
A regular pentagon
has 5 equal sides
and 5 equal angles
Hexagons
A hexagon has 6 sides
and 6 angles.
A regular hexagon
has 6 equal sides
and 6 equal angles
Octagons
An octagon has 8 sides
and 8 angles.
A regular octagon
has 8 equal sides
and 8 equal angles
3D Shapes
cubes
cylinders
cuboids
triangular
prism
hexagonal
prism