Waist-to-hip ratio (WHR), also known as waist-hip ratio, is the circumference of the waist divided by the circumference of the hips. Research associates a high WHR with certain health risks.

GCSE Edexcel Circles, sectors and arcs - Edexcel Circumference of a circle The circumference of a circle is its outside edge, and is the same distance from the centre at every point along its length.

Learn about and revise circles and their properties such as circumference and radius with this BBC Bitesize GCSE Maths Eduqas study guide.

Studies on the theme of optimal cutoff values of waist circumference (WC) and waist-to-hip ratio (WHR) for assessing risk of type II diabetes were reviewed.

Waist circumference compared with other obesity parameters as determinants of coronary artery disease in essential hypertension: a 6-year follow-up study. Hypertens Res 2016; 39: 475–479.