👉 Learn how to find the area and perimeter of triangles. A triangle is a shape of three sides. The area of a shape is the ...

👉 Learn how to find the area and perimeter of trapezoids. A trapezoid is a quadrilateral with one pair of parallel sides.

The perimeter is the distance around the outside of a 2D shape. The distance can be measured in units like millimetres, centimetres, metres and kilometres. To work out the perimeter, add up the ...