GEOMETRY OF 2 D

SHAPES Two dimensional shapes can be various polygons or

more complex shapes. The perimeter of each can be

found along with the area of each.

Perimeter of 2D figures • The perimeter of any two- dimensional shape can

be found by adding all the dimensions of the outer

sides. o We do not include any of the sides of the shape that are inside for

perimeter because perimeter measures the distance around the outsides

of the shape—units are being added so our final answer is in units.

Area of 2D figures

AREA OF A RECTANGLE

AREA OF A RECTANGLE

AREA OF A TRIANGLE

AREA OF A TRAPEZOID

You can also break up the trapezoids into triangles and or squares and

rectangles depending on the given measurements—then the partial

areas should be added for total area.