group competition the faster group is the winner
TRANSCRIPT
Group Group competitioncompetition
The faster group is the winner.
The The groupsgroups
Group1: Katherine, Alex.Z, JackGroup2:, Chris, Claudia, Lewis, MaxGroup3: Caroline, Allen, Jerry, LisaGroup4: Lois, Karl, Robert, AntonyGroup5: Catherine, Angel, Emily, VincentGroup6: Angela, Tiffany, Eric, KrystalGroup7:Nicole,Javi, Penny , Alex.T
VS.VS.
Groups orderGroups order
Find the volume of the figure
Answer key
Group2 VS. Group3Group2 VS. Group3
126ft3
The figure is a general right prism.We should use the formula ：
Volume=area of base × heightBase area= 6 triangles’
area=1/2×4×3.5×6=42ft2
V= base area × h=42×3=126ft3
Find the volume
Answer key
Group4 VS. Group5Group4 VS. Group5
solutionThe figure equals half of a
rectangular prism, we can use the formula: v=1/2(base area ） ×h
Base area= 3×3ft2, h=4ftV= (9×4)/2=18ft3
Find the volume Answer key
Group6 VS. Group7Group6 VS. Group7
solutionWe should use the formula: v=
base area×hV=
πr2×h=5×5×3.14×4=314inches3
Answer key
Group2 VS. Group3Group2 VS. Group3
solution Hexagonal: having six sides Apothem: the perpendicular line or
distance from the centre of a regular polygon to any of its sides
Base area=6 triangles’ areas=(6×5×4.3)/2=64.5yd2
H=5yd V=base area × h=64.5×5=322.5yd3
6 vs ?
Answer key
Group? VS. Group?Group? VS. Group?
solutionTrapezoidal: resembling a trapezoidTrapezoid: a flat shape with four straight
sides, one pair of opposite sides being parallel and the other pair not parallel
Base area= the trapezoid’s area=(3+5) ×1.7 ×(1/2)=6.8km2
H=6kmV=base area × h=6.8 × 6=40.8km3
Determine the surface area of each Determine the surface area of each composite object to the nearest tenth composite object to the nearest tenth of a square centimeter where necessary of a square centimeter where necessary
Answer key
Group? VS. Group?Group? VS. Group?
solution surface area （ cylinder ） =6π*20+2π3*3 Surface area （ small Rectangular ） =
2*10*15+3*10*2+15*3*2 Surface area （ big Rectangular ） =7*35*4+35
*35 Answer ： 3880+102π
What have you learned in this class? The winner group which answers more
important answer.
Final roundFinal round