1. Name the Shape circle square rectangle triangle hexagon octagon
pentagon

2. Triangle Names A triangle has 3 sides and 3 angles c 60° a b a
The angles and sides of this triangle are all different.
Equilateral triangles have 3 equal sides and 3 equal angles.
Isosceles triangles have 2 equal sides and 2 equal angles.
It is a scalene triangle.
a + b + c = 180°

3. Triangle Names c b a 90° obtuse angle This is a
This is an obtuse-angled
triangle.
This is a
right-angled
triangle. c a b
This is an acute-angled
triangle.
obtuse angle
One angle is obtuse
One angle is 90°.
90°
a, b and c are all acute angles
greater than 90°
less than 90°

4. Quadrilaterals A quadrilateral has 4 sides and 4 angles.
It can be split into 2 triangles.
and 4 angles.
The sum of the angles of any quadrilateral = 2 x 180° = 360°.
p + q + r + s = 360° p q r s

5. Special Quadrilaterals
These are trapezia
Trapezium
One pair of sides parallel

6. Special Quadrilaterals
These are parallelograms
Opposite sides parallel a b
Opposite angles equal
Opposite sides equal
Parallelogram

7. Special Quadrilaterals
These are rhombuses
Rhombus
Unequal diagonals
Parallelogram with all sides equal
Diagonals perpendicular

8. Special Quadrilaterals
These are rectangles
Diagonals equal
Rectangle
Parallelogram with perpendicular sides
Diagonals not perpendicular

9. Special Quadrilaterals
These are squares
Rectangle with all sides equal
Square
Diagonals at right angles
Diagonals equal

10. Special Quadrilaterals
These are kites
Unequal diagonals
Kite
Two pairs of adjacent sides equal
Diagonals at right angles

11. Pentagons A regular pentagon has 5 equal sides and 5 equal angles
A pentagon has 5 sides
and 5 angles.
A regular pentagon
has 5 equal sides
and 5 equal angles

12. Hexagons A regular hexagon has 6 equal sides and 6 equal angles
and 6 angles.
A hexagon has 6 sides
A regular hexagon has 6 equal sides
and 6 equal angles

13. Octagons A regular octagon has 8 equal sides and 8 equal angles
An octagon has 8 sides
and 8 angles.
A regular octagon has 8 equal sides
and 8 equal angles

14. 3D Shapes
cuboids
cubes
hexagonal prism
cylinders
triangular prism