The circumference

Abacus

A triangle with at least two sides equal in length

Ten (10)

7.03

One hundred and eighty (180)

Nine (9)

Ninety degrees (90)

Two (2)

Eighty-eight percent (88%)

Challenge the Brain

The circumference

Abacus

A triangle with at least two sides equal in length

Ten (10)

7.03

One hundred and eighty (180)

Nine (9)

Ninety degrees (90)

Two (2)

Eighty-eight percent (88%)

It's a triangle that has no equal sides or angles

Thirty (30)

It's the ratio of a circle's circumference to its diameter

Twelve (12)

Ten (10)