Page 158 - NUMINO TG_6A
P. 158
10Fill It with Chocolate Pieces Unit
tMa erial Cylinder Sheet [A3], Scissors, Tape
CMath Vo abulary cylinder: an object with flat circular ends and long straight sides
2 Have students use the shapes in the cylinder sheet to create a cylinder. Which shapes did they use? 2. Have students cut out the shapes from the
cylinder sheet to make a cylinder. Have them
. Cut out the shapes from the cylinder sheet to make a cylinder. use tape to connect the three pieces. Remind
Use tape to connect the three pieces. them not to overlap the edges of the paper.
What you need: Cylinder Sheet(A3), Scissors, Tape
3 . A rectangular piece of paper is taped to make a container. Find the 3. Have students work with partners to find
the radius of lid of a container that was made
lid of this container. with a rectangular piece of paper that is
31.4 cm long and 12 cm wide.
Have students figure out which one is the lid of the container. First have them discuss how the length
of the rectangle is related to the circumference of the lid. Then they can get the radius of the lid.
31.4cm
12cm
Review the relationship between the length
of the rectangle and the circumference of
the lid with them. The circumference is twice
the radius times 3.14.
3cm 5cm 10cm 2.5cm Have them find the circumference of each
circle in turn:
Explain how you found the lid. 2 3 3.14 18.84
2 5 3.14 31.4
The length of the rectangle is equal to the 2 10 3.14 62.8
circumference of the container because the 2 2.5 3.14 15.7
rectangular piece of paper wraps around the The lid has a radius of 5 cm.
container without overlapping.
The lid has a radius of 5 cm because the What is the relationship Have students write down their answers and
circumference is twice its radius 3.14, and between the length of
2 5 3.14 equals 31.4 cm. the rectangle and the explain how they figured out which lid had
circumference of the lid?
the correct radius.
10. Fill It with Chocolate Pieces 85
Refer to .
The length of the rectangle is equal to the circumference of the container because the rectangular piece of
paper wraps the container without overlapping. Another way to solve the problem is to use the following
formula to determine the radius:
r (circumference ) 2
r (31.4 3.14) 2
10 2
5
The lid has a radius of 5 cm.
6A Unit 10 141
tMa erial Cylinder Sheet [A3], Scissors, Tape
CMath Vo abulary cylinder: an object with flat circular ends and long straight sides
2 Have students use the shapes in the cylinder sheet to create a cylinder. Which shapes did they use? 2. Have students cut out the shapes from the
cylinder sheet to make a cylinder. Have them
. Cut out the shapes from the cylinder sheet to make a cylinder. use tape to connect the three pieces. Remind
Use tape to connect the three pieces. them not to overlap the edges of the paper.
What you need: Cylinder Sheet(A3), Scissors, Tape
3 . A rectangular piece of paper is taped to make a container. Find the 3. Have students work with partners to find
the radius of lid of a container that was made
lid of this container. with a rectangular piece of paper that is
31.4 cm long and 12 cm wide.
Have students figure out which one is the lid of the container. First have them discuss how the length
of the rectangle is related to the circumference of the lid. Then they can get the radius of the lid.
31.4cm
12cm
Review the relationship between the length
of the rectangle and the circumference of
the lid with them. The circumference is twice
the radius times 3.14.
3cm 5cm 10cm 2.5cm Have them find the circumference of each
circle in turn:
Explain how you found the lid. 2 3 3.14 18.84
2 5 3.14 31.4
The length of the rectangle is equal to the 2 10 3.14 62.8
circumference of the container because the 2 2.5 3.14 15.7
rectangular piece of paper wraps around the The lid has a radius of 5 cm.
container without overlapping.
The lid has a radius of 5 cm because the What is the relationship Have students write down their answers and
circumference is twice its radius 3.14, and between the length of
2 5 3.14 equals 31.4 cm. the rectangle and the explain how they figured out which lid had
circumference of the lid?
the correct radius.
10. Fill It with Chocolate Pieces 85
Refer to .
The length of the rectangle is equal to the circumference of the container because the rectangular piece of
paper wraps the container without overlapping. Another way to solve the problem is to use the following
formula to determine the radius:
r (circumference ) 2
r (31.4 3.14) 2
10 2
5
The lid has a radius of 5 cm.
6A Unit 10 141
