You can see that there are two congruent angles, each measuring 45º. This means this is an isosceles triangle. This type of triangle can also be called a right-angled triangle. You can see ...

Each triangle type has a different colour (pink for scalene, red for equilateral, blue for isosceles), which allows you and the students to refer to the triangles without having to introduce their ...

Each triangle type has a different colour (pink for scalene, red for equilateral, blue for isosceles), which allows you and the students to begin referring to the triangles by their formal geometric ...