NRICH: Diagonals
NRICH: Diagonals
How many diagonals does a regular icosagon (20 sides) have?
- A square has 2 diagonals, a regular pentagon has 5 and a regular hexagon has 9.How many diagonals does a regular icosagon (20 sides) have?This problem is adapted from the South East Asian Mathematics Competition
You can find more short problems, arranged by curriculum topic, in our short problems collection.
Age 14 to 16
NRICH (University of Cambridge)
Math Topics
Geometry, Patterning & Sequencing
High School
9th Grade, 10th Grade, 11th Grade
RELATED LISTINGS
Showing 1 - 2 of 2
NRICH (University of Cambridge)
NRICH provides thousands of free online mathematics resources for ages 3 to 18, covering all stages of early years, primary and secondary school education – completely free and available to all.
NRICH (University of Cambridge)
Do you enjoy thought-provoking questions? If so, this is the place for you.
What are you looking for?
Organization
NRICH (University of Cambridge)
Website URL
Type of Resource
Challenge
Assigned Categories
Resource k12
NRICH: Diagonals
How many diagonals does a regular icosagon (20 sides) have?
- A square has 2 diagonals, a regular pentagon has 5 and a regular hexagon has 9.How many diagonals does a regular icosagon (20 sides) have?This problem is adapted from the South East Asian Mathematics Competition
You can find more short problems, arranged by curriculum topic, in our short problems collection.
Age 14 to 16
NRICH (University of Cambridge)
Math Topics
Geometry, Patterning & Sequencing
High School
9th Grade, 10th Grade, 11th Grade
RELATED LISTINGS
Showing 1 - 2 of 2
NRICH (University of Cambridge)
NRICH provides thousands of free online mathematics resources for ages 3 to 18, covering all stages of early years, primary and secondary school education – completely free and available to all.
NRICH (University of Cambridge)
Do you enjoy thought-provoking questions? If so, this is the place for you.
What are you looking for?
Organization
NRICH (University of Cambridge)
Website URL
Type of Resource
Challenge
