Key learning points

1. Many shapes have similar properties.
2. It is not always clear which shape is being described so more details may be needed.
3. Knowing the properties of shapes can help you solve more complex problems.

Common misconception

Keywords

• Parallelogram - A parallelogram is a quadrilateral with two pairs of parallel and equal sides.

• Rhombus - A rhombus is parallelogram where all the sides are the same length.

• Trapezium - A trapezium is a quadrilateral with exactly one pair of parallel sides.

• Equilateral triangle - Equilateral triangles have three equal-sized angles and three edges of equal length. They are regular triangles.

• Isosceles triangle - Isosceles triangles have two angles that are equal. That is also true for its side lengths: two sides are of equal length.