1. Area of Polygons
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2. Warm Up Find the area. 1. 2. 3. 4. 90cm2 230cm2 6ft2 20cm2 15cm 20cm
90cm2
230cm2
15cm
20cm
12cm
23cm
6ft2
20cm2
4ft
5cm
3ft
8cm

3. Area of Polygons

4. Area of Polygons Flippable

5. Area of Triangles Perimeter Area of Rectangles Area of Parallelograms
Perimeter and Area

6. Perimeter Flap Add the lengths of each side. 10cm + 10cm + 18cm + 18cm
Ex: Find the perimeter.
10cm + 10cm + 18cm + 18cm
56cm
10cm
18cm

7. Area of Rectangles Flap Area = length x width
Ex: Find the area.
A = (20in)(12in)
A = 240in2
12in
20in

8. Area of Parallelograms Flap Area = base x height
Ex: Find the area.
A = (30cm)(34cm)
34cm
A = 1020cm2
30cm

9. Find the area.
A = (6cm)(5cm) ÷ 2
5cm
A = 15cm2
6cm

10. Area of Triangles Flap Continued
Find the area.
A = (12cm)(9cm)÷2
A = 54cm2
9cm
12cm

11. Closure
Explain how the triangle area formula is related to the parallelogram formula.
Two triangles make up a parallelogram making a triangle half of a parallelogram.