Name That Shape
Polygons
Triangles
Nets and Surface Area
Vocabulary
100
Name the polyhedra.
Rectangular Prism
100
Select all of the parallelograms. For each figure that is not selected, explain how you know it is not a parallelogram.
B and C are parallelograms (C is also a rectangle). A is a trapezoid (two opposite sides are not parallel and two are not the same length), D is a pentagon, and E is a (right) triangle.
100
Find the area of the triangle. Explain or show your reasoning.
12 square units.
100
Select all of the nets that can be folded into a rectangular prism.
C
100
_________ is the number of square units that covers a two-dimensional region, without any gaps or overlaps.
Area
200
What three-dimensional figure can be assembled from the net?
Square Pyramid
200
Find the area of the shaded region. Show or explain your reasoning.
34 sq cm.
The outer rectangle has an area of 40 sq cm while the inner rectangle has an area of 6 sq cm. 40−6=34.
200
Find the area of the triangle. Explain or show your reasoning.
6 square units.
200
Select all units that can be used for surface area. Explain why the others cannot be used for surface area.
- square meters
- feet
- centimeters
- cubic inches
- square inches
- square feet
1. Square Meters - 5. Square Inches - 6. Square Feet
200
_________ means “take apart.” We use this word to describe taking a figure apart to make more than one new shape.
Decompose
300
What polyhedron can be assembled from this net? Explain how you know.
Triangular Prism
300
Select all the polygons.
A and C
300
Select all drawings in which a corresponding height h for a given base b is correctly identified.
A, B, D, F
300
- Find the volume of the figure in cubic units.
- Find the surface area of the figure in square units.
300
________ is the shortest distance from the base of the shape to the opposite side (for a parallelogram) or opposite vertex (for a triangle).
Height
400
Name this shape.
Hexagonal Prism
400
Select all parallelograms that have a correct height labeled for the given base.
A,C,D
400
Which of the three triangles has the greatest area? Show your reasoning.
All three triangles have the same area of 10 square units.
400
Find the surface area of this polyhedron. Show your reasoning.
72 Square Units
400
________ is a closed, two-dimensional shape with straight sides that do not cross each other.
Polygon
500
Select all the polyhedra.
A,B,D
500
Find the area of the shape. Show your reasoning.
19 square units.
500
Select all triangles that have an area of 8 square units. Explain how you know.
A, B, D, and E.
500
Draw a net for this rectangular prism, label the dimensions correctly.
500
A ____ is a two-dimensional figure that can be folded to make a polyhedron.
Net