Find out about scalene, equilateral, isosceles and right-angled triangles. What are the parts ... to work out the area of a flat shape. What is tessellation? Find out how tessellation is when ...
An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the base of the equal sides are equal. An equilateral triangle has 3 sides ...