An equilateral triangle fits into its outline three times in a full 360° turn. Image caption, An isosceles triangle ... Practise working out properties of triangles with this quiz.

Discusses the properties and types of triangles, explaining that a triangle is a closed figure with three sides and angles. It categorizes triangles into equilateral, isosceles, scalene ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...