Perimeter and Perimeter and Area of Area of

Rectangles, Rectangles, Squares, and Squares, and

TrianglesTriangles

Perimeter and AreaPerimeter and Area

VocabularyVocabulary

(Vocab section of your binders!!)(Vocab section of your binders!!)

PerimeterPerimeter ~ The distance around a ~ The distance around a polygon, or shape.polygon, or shape.

AreaArea ~ The number of square units ~ The number of square units needed to cover a given surface. We needed to cover a given surface. We measure area in square units.measure area in square units.

PerimeterPerimeter

To find the perimeter, add up all of the To find the perimeter, add up all of the sides.sides.2 cm

8 cm

2 cm

8 cm

4 cm

5 cm

4 cm3 cm

5 cm

3 cm 3

cm3 cm

3 cm

3 cm3 cm

3 cm

3 cm

PerimeterPerimeter

Even if the value of the side is not Even if the value of the side is not given, use what you know to solve given, use what you know to solve for the perimeter.for the perimeter.

10 mm

4 mm

5 cm

4 mm

Area of RectanglesArea of Rectangles

Area = length • width A = l Area = length • width A = l • w• w

Use this formula to find the area of a Use this formula to find the area of a rectangle.rectangle.

7 m

3 m

2 m

5 m

6 m

1 m

Area of TrianglesArea of Triangles

Area = ½ • base • heightArea = ½ • base • heightA=1/2bh A=1/2bh

10.5 km

13.2 km

9.6 cm

2.9 cm

Area of ParallelogramsArea of Parallelograms

Area = base • heightArea = base • height A = A = bhbh

7 m

9 m

4.7 m

6.2 m