12.7 Similar Solids HW pg. 850 #422 evens 1 April 12, 2013 Apr 127:33 AM Bellwork 1. If the earth has a diameter of 12,756.3 km, what is the volume of the western hemisphere? 2. If the surface area of a sphere is about 1,017.876 cm 2 , what is the radius of the sphere? 3. A beach ball has a radius of 20 inches. If the white sections were removed from the beach ball, what would the remaining volume be? (assume all sections are equal in size) 5.43 X 10 11 9=r 22,340.2 = V
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12.7 Similar Solids
HW pg. 850 #422 evens 1
April 12, 2013
Apr 127:33 AM
Bellwork 1. If the earth has a diameter of 12,756.3 km, what is the volume of the western hemisphere?
2. If the surface area of a sphere is about 1,017.876 cm 2, what is the radius of the sphere?
3. A beach ball has a radius of 20 inches. If the white sections were removed from the beach ball, what would the remaining volume be? (assume all sections are equal in size)
5.43 X 1011
9 = r
22,340.2 = V
12.7 Similar Solids
HW pg. 850 #422 evens 2
April 12, 2013
Apr 127:39 AM
12.7 Similar SolidsDef: 2 same type solids w/ = ratios (scale factor)
12.7 Similar Solids
HW pg. 850 #422 evens 3
April 12, 2013
Apr 127:44 AM
Similar Solids Theorem: If 2 similar solids have a scale factor of a:b, thencorresponding areas have ratio of a2:b2 and corresponding volumes have ratio of a3:b3.