Area of Polygons TeacherTwins©2015.

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Presentation transcript:

Area of Polygons TeacherTwins©2015

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

Area of Polygons

Area of Polygons Flippable

Area of Triangles Perimeter Area of Rectangles Area of Parallelograms Perimeter and Area

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

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

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

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

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

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.