Which diagram best represents the relationship among Equilateral triangles, Triangles and Right-angled triangles?

Two separate circles inside a larger circle

Correct answerYour answerThree circles, each inside the next

Correct answerYour answerTwo overlapping circles inside a larger circle

Correct answerYour answerTwo separate circles, each overlapping a third circle

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer A

Correct answer: A

Both equilateral triangles and right-angled triangles are triangles: both circles go inside Triangles.
Every angle of an equilateral triangle is 60°, so none is right-angled: the two inner circles do not meet.
So two separate circles inside a larger circle.

Worth noting

Two overlapping circles inside a larger one would claim a triangle that is both equilateral and right-angled, which cannot exist.

Ten questions from Venn Diagrams, at your own pace.

Explanation