Transcript Prperties of 2-D Shapes - Woodhouse Primary School
Properties of 2-D Shapes
Equilateral Triangle
Key Features
All three sides are the same length and all three angles are equal.
Lines of Symmetry?
Three.
Rotational Symmetry?
Order 3.
Isosceles Triangle
Key Features
A triangle with two equal sides and two equal angles.
Lines of Symmetry?
One.
Rotational Symmetry?
None.
Scalene Triangle
Key Features
A triangle with three different sides and three different angles.
Lines of Symmetry?
None.
Rotational Symmetry?
None.
Right-Angled Triangle
Key Features
A triangle with one right-angle.
Can a Triangle be Right-Angled and
Yes.
Lines of Symmetry?
Only if it’s an
- one line.
Rotational Symmetry?
None.
Quadrilateral
Key Features
A shape with four sides.
Lines of Symmetry?
It depends on what sort of quadrilateral it is.
Rotational Symmetry?
It depends on what sort of quadrilateral it is.
Names of Special Quadrilaterals
,
,
,
Rectangle
Key Features
with four right-angles.
Opposite sides are the same length.
Lines of Symmetry?
Two, unless the rectangle is a
Rotational Symmetry?
Order 2, unless the rectangle is a
Is a Rectangle a
Yes, because both pairs of opposite sides are parallel.
Square
Key Features
with four equal sides and four right-angles.
Lines of Symmetry?
Four.
Rotational Symmetry?
Order 4.
?
Yes, because it’s a quadrilateral with four right-angles.
Yes, because both pairs of opposite sides are parallel.
?
Yes, because it’s got four sides all the same length.
Parallelogram
Key Features
with opposite sides that are parallel and the same length.
Lines of Symmetry?
Only if it’s a
or a
Rotational Symmetry?
Order 2.
Oblong
Key Features
which is not a
Lines of Symmetry?
Two.
Rotational Symmetry?
Order 2.
Is an Oblong a
?
Yes, because both pairs of opposite sides are parallel.
Trapezium
Key Features
sides.
with just one pair of parallel
Lines of Symmetry?
Only if it’s an isosceles trapezium.
Rotational Symmetry?
None.
Rhombus
Key Features
with four equal sides.
Lines of Symmetry?
Two.
Rotational Symmetry?
Order 2.
?
Yes, because both pairs of opposite sides are parallel.
Kite
Key Features
with two pairs of adjacent sides that are equal.
Lines of Symmetry?
One.
Rotational Symmetry?
None.
Regular Pentagon
Key Features
A shape with five equal sides and five equal angles.
Lines of Symmetry?
Five.
Rotational Symmetry?
Order 5.
Regular Hexagon
Key Features
A shape with six equal sides and six equal angles.
Lines of Symmetry?
Six.
Rotational Symmetry?
Order 6.
Regular Octagon
Key Features
A shape with eight equal sides and eight equal angles.
Lines of Symmetry?
Eight.
Rotational Symmetry?
Order 8.
Regular Decagon
Key Features
A shape with ten equal sides and ten equal angles.
Lines of Symmetry?
Ten.
Rotational Symmetry?
Order 10.
Circle
Key Features
Every point on the circumference is the same distance from the centre.
Lines of Symmetry?
Infinite.
Rotational Symmetry?
Order infinity.