Spectrum Math Grade 3 Chapter 9 Lesson 2 Answer Key Solid Figures

Students can use the Spectrum Math Grade 3 Answer Key Chapter 9 Lesson 9.2 Solid Figures as a quick guide to resolve any of their doubts.

Spectrum Math Grade 3 Chapter 9 Lesson 9.2 Solid Figures Answers Key

A solid figure is a three-dimensional object. Solid figures may be hollow or solid.


A face is the shape formed by the edges of a solid figure.
An edge is where 2 faces intersect.
A vertex or corner is the point where 3 or more edges come together.

Complete the following.

Question 1.
Solid Figure: cube
Number of Square Faces: ____________
Number of Rectangle Faces: _____________
Number of Triangle Faces:  _____________
Answer:
A cube doesn’t have any Triangle (or) Rectangle face but contain six Equal faces that are listed as shown below.
Number of Square Faces:  6
Number of Rectangle Faces: 0
Number of Triangle Faces: 0

Question 2.
Solid Figure: rectangular prism
Number of Square Faces: ____________
Number of Rectangle Faces: _____________
Number of Triangle Faces: _____________
Answer:
The name itself indicating that the prism is containing every face in a Rectangle shape, it is known as Rectangle Prism. It posses the 6 Rectangular faces in it.
Number of Square Faces: 0
Number of Rectangle Faces: 6
Number of Triangle Faces: 0

Question 3.
Solid Figure: square pyramid
Number of Square Faces:
Number of Rectangle Faces:
Number of Triangle Faces:
Answer:
The name of pyramid specifying the pyramid is in Square shape , it is called as  Square pyramid having a single square face and 4 Triangular faces.
Number of Square Faces: 1
Number of Rectangle Faces: 0
Number of Triangle Faces: 4

Question 4.
How many edges does a sphere have?
___________ edges
Answer:
Number of edges in a sphere is zero. since the sphere contain a single curved surface, there is no edge.

Question 5.
How many edges does a square pyramid have?
_____________ edges
Answer:
Generally , a square pyramid has 8 edges. It is a shape having 4 triangular faces and a square base.

Question 6.
How many edges does a cube have?
____________ edges
Answer:
A cube contain 12 edges. It is a normal solid having six Equal Square faces having similar size.

Question 7.
How many edges does a rectangular prism have?
____________ edges
Answer:
Number of edges in a rectangular prism are 12. The faces in a rectangular prism contains totally squares , then it is often known as cube.

Question 8.
How many corners does a square pyramid have?
____________ corners
Answer:
Generally , a square pyramid has 5 corners (A point where Two line segments unite).

Give a physical example of each of the following plane figures.

Question 9.
a. cube

b. rectangular prism
Answer:
Notebooks is an Example of Rectangular prism

c. square pyramid
Answer:
famous Pyramid of Giza is Example for Square Pyramid.

Question 10.
a. sphere
Answer:
Globe is an good example for Sphere since it is circular in shape.

b. cylinder
Answer:
Liquid Petroleum Gas is the best Example for Cylinder since it contain 2 edges and 3 faces.

c. cone
Answer:
Traffic -cones which are employed for dividing the rods is an Example for cone.