M ATH 451 T ECH A CTIVITY By Cassie Spartz spartzcm.wikispaces.com/

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Presentation transcript:

M ATH 451 T ECH A CTIVITY By Cassie Spartz spartzcm.wikispaces.com/

L ET ’ S R EVIEW What is a cross-section? The face that results from slicing through a solid. GeoGebra File: Play around with the cross sections of this cube at: What are some cross-sections of a cube? Square Equilateral Triangle Rectangle Scalene Triangle Pentagon Hexagon Non-rectangular Parallelogram

S QUARE C ROSS -S ECTION

E QUILATERAL C ROSS -S ECTION

R ECTANGLE C ROSS -S ECTION

S CALENE T RIANGLE C ROSS -S ECTION

P ENTAGON C ROSS -S ECTION

H EXAGON C ROSS -S ECTION

N ON -R ECTANGULAR P ARALLELOGRAM C ROSS -S ECTION

G RADE 7 M ATHEMATICS S TANDARDS Geometry Draw, construct, and describe geometrical figures and describe the relationships between them. Describe the two-dimensional figures that result from slicing three-dimensional figures, as in plane sections of right rectangular prisms and right rectangular pyramids. Solve real-life and mathematical problems involving angle measure, area, surface area, and volume.

O BJECTIVE A main concept of geometry in 7 th grade is learning and utilizing cross-sections of objects. Utilizing knowledge of cross-sections in real life applications.

A SSESSMENT Go to Kahoot.it to assess what we have discussed about cross-sections.

R EAL L IFE C ROSS -S ECTIONS What are some ways we can apply cross-sections in real-life? Geography and Exploration Estimate ages of trees Foods Cells in Science And many more….