On the paper with the triangle use the 21 pennies to build towers on each circle. ... To extend it to a higher-order perimeter magic triangle start by drawing a new triangle.

Area of Triangle Formula: In general, "area" refers to the region inside the boundary of a flat object or figure and is measured in square units, with the standard unit being square meters (m²).

Video summary. We demonstrate how to calculate the perimeter and area of simple and compound shapes. The importance of using correct units in measurement is emphasised via the increasing annoyance ...

KS3 Maths Perimeter, Area, Volume learning resources for adults, children, parents and teachers. ... Learn how to calculate the area of triangles with this BBC Bitesize Maths article.