Maths Topic 19 - 2D shapes: Rhombus, kite, parallelogram etc


2D Shapes: kites, quadrilaterals, triangles, parallelograms, rhombuses, polygons, circles, etc. are often tested in 11+ and Selective School exams in the UK.

Examples

Example Question 1:

Which 2D shape has one set of parallel lines?

(a) parallelogram,  (b) kite,  (c) rhombus,  (d) trapezium,  (e) rectangle

Answer: (d)

Explanation: see diagram

Example Question 2:

Which of the following shapes does not fit in the group?

(a) rhombus,  (b) pentagon, (c) trapezium, (d) kite,  (e) square

Answer: (b)

Explanation: All the other shapes, apart from a pentagon, have 4 sides and 4 angles.

Example Question 3:

If the radius of a large circle is 13.8cm, what is the diameter?

Answer: 27.6cm

Explanation: The radius of a circle is always half of the diameter – see diagram.

Video Tutorials

Angles in Quadrilaterals

 

Angles in Triangles

 

Triangles

 

Properties

 

Names of 2D Shapes

 

Triangles

 

Quadrilaterals