Area of Circles Half the circumference Parallelogram A = b h radius
Area of Circles Find the area of each figure in A = r 2 A = ( 3 ) 2 A = ( 9 ) A = in 2 20 m 2. A = r 2 A = ( 10 ) 2 A = ( 100 ) A = m 2
Area of Circles Find the area of each figure cm A = ( 12 ) A = cm 2
Pg – 3 #1 – 9, 10 – 27 Find the area of each circle. Give an exact area and an approximate area to the nearest square unit. A = r 2 A = ( 9 ) A = ft 2 1. r = 3 ft A = 3 2 A = 9 ft 2 A = r 2 A = ( 25 ) A = m 2 2. d = 10 m A = 5 2 A = 25 m 2 r = 5 m
Pg – 3 #1 – 9, 10 – 27 Find the area of each circle. Give an exact area and an approximate area to the nearest square unit. A = r 2 A = ( 400 ) A = cm 2 3. r = 20 cm A = 20 2 A = 400 cm 2 A = r 2 A = ( 144 ) A = ft 2 = 12 2 = 144 ft ft
Pg – 3 #1 – 9, 10 – 27 Find the area of each circle. Give an exact area and an approximate area to the nearest square unit. A = r 2 A = ( 64 ) A = m 2 = 8 2 = 64 m 2 16 m 5. A = r 2 A = ( 900 ) A = cm 2 = 30 2 = 900 cm 2 60 cm 6.
Pg – 3 #1 – 9, 10 – 27 Find the area of each figure to the nearest square unit. A = 70 + ½ ( ( ) A = = /2 = 89 in 2 10 in 3.5 in 7 in /2 r 2
Pg – 3 #1 – 9, 10 – 27 Find the area of each figure to the nearest square unit. A = ( ( 400 ) A = = 20 2 = 2856 yd r 2 40 yd
Pg – 3 #1 – 9, 10 – Which has a greater area, a circle with radius 2 m or a square with side length 2 m? Explain. A = ( ( 4 ) A = in 2 A = 2 2 A = r 2 2 m A = in 2 A = (2) (2)
Naming Space Figures Prisms Pyramids Cylinders Cone Sphere
Naming Space Figures For each figure, describe the base and name the figure. 1. triangle Triangular prism 2. hexagon Hexagonal pyramid
Naming Space Figures Name the figure drawn from each net. 3. Octagonal pyramid 4. Triangular Prism
Pg – 4 #1 – 6, 8 – 26 For each figure, describe the base(s) and name the figure. 1. hexagon Hexagonal pyramid 2. pentagons Pentagonal prism
Pg – 4 #1 – 6, 8 – 26 For each figure, describe the base(s) and name the figure. 3. triangles Triangular prism
Pg – 4 #1 – 6, 8 – 26 Name the space figure you can form from each net. Square prism 4.
Pg – 4 #1 – 6, 8 – 26 Name the space figure you can form from each net. Triangular Pyramid 5.
Pg – 4 #1 – 6, 8 – 26 Name the space figure you can form from each net. Triangular Prism 6.
Pg – 4 #1 – 6, 8 – 26
Pg – 3 #1 – 9, 10 – 27