What is the area and perimeter of a triangle? The area of any triangle is the total region enclosed within the triangle's three sides. Area of triangle formula = 1/2 * b * h. Perimeter of a ...

The interior angles in a triangle always add up to 180º. An equilateral triangle has 3 sides of equal length. The dashes on the lines show they are equal in length. All of the angles are also equal.

Find out about scalene, equilateral, isosceles and right-angled triangles. What are the parts ... circumference and diameter. What is the perimeter? Discover how to work out the area of a 2D ...