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QR Challenge: Circumference and Area

Created using the ClassTools QR Treasure Hunt Generator

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Detailed Case Study Search the Archive Feedback

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

Questions / Answers (teacher reference)

Question

Answer

1. A circular fountain has a radius of 9.4 feet. Find its diameter and circumference18.8 feet and 56.4 feet
2. Find the radius of circumference of a CD with a diameter of 4.75 inches.2.375 in and 14.25 in.
3. A hubcap has a radius of 16 centimeters. What is the area of the hubcap?803.84 cm sq.
4. A biscuit recipe calls for the dough to be rolled out and circles to be cut from the dough. The biscuit cutter has a radius of 4 cm. Find the area of the biscuit once it is cut.50.24 cm sq.
5. Jonathan ordered a 6 inch diameter pizza. Marie ordered a 12 inch diameter pizza. How many times greater is the area of Marie's pizza than Jonathans?81 sq. inches.
6. A circle has a radius 6.3 kilometers. What is the approximate circumference of the circle?119.07 sq kilometers

 


Circumference and Area: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_circular_fountain_has_a_radius_of_9.4_feet.__Find_its_diameter_and_circumference

Question 1 (of 6)

 


Circumference and Area: QR Challenge

https://www.classtools.net/QR/decode.php?text=Find_the_radius_of_circumference_of_a_CD_with_a_diameter_of_4.75_inches.

Question 2 (of 6)

 


Circumference and Area: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_hubcap_has_a_radius_of_16_centimeters.__What_is_the_area_of_the_hubcap?

Question 3 (of 6)

 


Circumference and Area: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_biscuit_recipe_calls_for_the_dough_to_be_rolled_out_and_circles_to_be_cut_from_the_dough.__The_biscuit_cutter_has_a_radius_of_4_cm.__Find_the_area_of_the_biscuit_once_it_is_cut.

Question 4 (of 6)

 


Circumference and Area: QR Challenge

https://www.classtools.net/QR/decode.php?text=Jonathan_ordered_a_6_inch_diameter_pizza.__Marie_ordered_a_12_inch_diameter_pizza.__How_many_times_greater_is_the_area_of_Marie's_pizza_than_Jonathans?

Question 5 (of 6)

 


Circumference and Area: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_circle_has_a_radius_6.3_kilometers.__What_is_the_approximate_circumference_of_the_circle?

Question 6 (of 6)