Mark the 90° right angles in the bottom left and top right corners. You can split a rectangle into 2 right-angled triangles. Image caption, STEP 2: Use the compass to draw a circle. Put a dot ...

to build on students' knowledge of triangle and to develop students' reasoning with properties of triangle to develop students' language related to attributes of triangles (e.g., from 'it looks like a ...

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 ...