Creating problems �involving surface area of solid/space figures, with reasonable answers. �M6ME-IVc-99
Day 3
Activity (Group Work)
Mechanics:
1)Divide the class into 3 groups.
2)Group 1 will be given name of solid figure.
3)Group 2 will be given the formula on how to get the surface area of the solid figure.
4)Pupils holding the activity cards will stand, raise the activity cards they are holding and go around to look for their partners while singing the song, “Math Song.”
5)As soon as they find their partners, they read together what is written on their activity cards.
6)The first to find their partners will be the winner.
Drill
Math Song
Mathematics (2x),
how it thrills (2x)
It is so exciting, and so interesting
I love Math (2x)
Mathematics (2x),
Challenging (2x)
Numbers are ideas,
numerals are symbols
Math, Math, Math (2x)
1.A box is 10 cm long, 12 cm wide and 20 cm high. Find its volume?
Review
Analyze then solve the problems.
2. A pyramid has a square base of side 20 cm and a height of 15 cm. Find the volume of the pyramid.
3. The height of a cube is 7 decimeter. Find the volume of the cube.
Read the problem below:
A cylinder shaped water pitcher has a radius of 6 inches and a height of 11.4 inches. Find the surface area of the pitcher.
Can you create a problem on surface area similar to the one given?
This time you will create problems involving the volume of a solid figures.
Group activity:
1.Grouping the pupils into four.
2. Distribute problems on surface area of solid figures
3.Create your own problem similar to the one given.
4.Choose a reporter to explain the work of the group.
Group 1:
Jason is wrapping a present. The box he is using is a rectangular prism with a length of 15 inches, a width 8 inches and a height of 6 inches. Find how many square inches of paper he needs to wrap the entire box.
Group 2
A certain music box has the shape of a cube. Each side of the music box is 20 cm long. What is the surface area of the box?
Group 3
A cosmetics company that makes small cylindrical bars of soap wraps the bars in plastic prior to shipping. Find the surface area of a bar of soap if the diameter is 4 cm and the height is 2.5 cm. (Use π =3.14)
Group 4
Find the surface area of a right circular cone-shaped building with a height of 10 cm and a radius of 8 cm.
After the activities are done, post your created problems from the given situations and follow the task below.
Read and solve the problem.
Illustrate and solve the problem with its solution.
How did you create problems?
Make a problem involving surface area based on the given situation. Let the other group find the answer to the problems.
1. the length is 2 m, the width is 3 m, and the height is 1.2 m of a rectangular box.
2. The side of a cube measures 25 cm.
3. The radius of a spherical tank is 1.5 m.
4.A pyramid has a square base of side 15 cm and a height of 14 cm.
5. a cylindrical tank of radius 5 dm and a height of 10 dm
Group Activity
Create problem on surface area using the given data below.
1)A piece of soap is 9 cm by 4 cm by 3cm.
Problem: _________________
Answer:__________
2)An aquarium is 0.8 m long, 0.4 m wide, and 0.45 dm deep.
3)An iron bar 2 m long and 0.05 m in diameter.
Problem: _________________
Answer:__________
4)An ice cream cone 2 cm in radius and 6 cm in height.
Problem: _________________
Answer:__________
Pair Share
Create problems involving surface area for the following situations then solve for the answer:
a)a box 44 cm by 9 cm by 6 cm
Problem: _________________
Answer:__________
b)a cone with height 9 dm and radius 4 dm
Problem: _________________
Answer:__________
Application (Group Activity)
c)a cabinet 1.2 m by 0.9 m by 0.5 m
Problem: _________________
Answer:__________
d)a ball with radius 10 cm
Problem: _________________
Answer:__________
e)a cylindrical tank 25 dm long and radius 8 dm
Problem: _________________
Answer:__________
Application (Group Activity)
What did you do to be able to create problems involving the surface area of solid figures?
Generalizarion
What are the steps in creating problems?
Steps in creating problems:
Familiarize yourself in the concepts.
Think of an explanation to everyday life real situations.
Think of the type of problem you want to create and the formula to be used.
Relate the problem to real life situations.
Study the solution in solving the problems.
Make your own styles/strategies to justify the solutions.
Generalizarion
Create problems involving surface area for the following situations. Solve for the answer.
1.A small gift box measures 8 cm long, 7 cm wide and 2 cm high.
2.A rectangular water tank is 5 meter high, 2 m wide and 3 m long.
3. rectangular prism with length of 5 m, width 7 m, and the height is 14.5 m.
4. a cube measures 30 cm.
5. a spherical tank with a radius of 1.5 m
Evaluation
Make a three (3) problem involving surface area. Write the answer to each problem on your answer sheet. You may use an aquarium, shoebox, swimming pool, and other rectangular prisms for the problem.
Assignment
Thank you for Listening!
DLL ctto Annalice Quinay
PPT Agustina Tan