Strand: Shape and Space:
General Outcome:
Describe the characteristics of 3-D objects and 2-D shapes, and analyze the relationships among them.
SLO - 9SS2. Surface Area – Determine the surface area of composite 3-D objects to solve problems (limited to right rectangular prisms, right triangular prisms, and right cylinders).
Prerequisite skills needed from previous grades:
Perimeter and Area Basics (Khan Academy video,)
Finding area of:
square and rectangles, (Khan Academy practice),
circles, (Khan Academy video, Khan Academy practice,
triangles (Khan Academy practice,
Finding area of composite 2-D shapes
What is a composite shape and how to figure out area.
Rectangular Shapes (YouTube #1, YouTube #2
Grade 9 expectations are:
Khan Academy (Volume, Surface Area, Perimeter)
Describe the characteristics of 3-D objects and 2-D shapes, and analyze the relationships among them.
SLO - 9SS2. Surface Area – Determine the surface area of composite 3-D objects to solve problems (limited to right rectangular prisms, right triangular prisms, and right cylinders).
Prerequisite skills needed from previous grades:
Perimeter and Area Basics (Khan Academy video,)
Finding area of:
square and rectangles, (Khan Academy practice),
circles, (Khan Academy video, Khan Academy practice,
triangles (Khan Academy practice,
Finding area of composite 2-D shapes
What is a composite shape and how to figure out area.
Rectangular Shapes (YouTube #1, YouTube #2
Grade 9 expectations are:
- I can identify the faces of a composite 3-D object.
Khan Academy (Volume, Surface Area, Perimeter)
- I can dissect the faces of 3-D objects into triangles, circles, and rectangles (or parts of these shapes).
- I can determine the dimensions needed to calculate the surface area of composite 3-D objects.
- I can calculate the surface area of composite 3-D objects.
- I can solve problems involving surface area.