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\ 10-Nov-2025 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

HOTS

21 st
Century #Computational Thinking
Skills
1. Using geo dotted paper, form the letters E, H, and L with the stated perimeters.
a. E → 22 units b. H → 24 units c. L → 20 units

2. Anita folded a rectangular piece of paper in half three times to make a square.
If one side of the final
square was 2 cm, what

was the area of the
piece of paper she started with?

Fun Activity 21 st #Experiential Learning,
Century
Skills #Subject Enrichment
Perimeter Game

Play this game with a friend or classmate using dice, coloured paper or cardboard
tiles, pencils or markers, and a score sheet.
• Each player rolls the dice to determine how many
cardboard tiles to use to build their starting shape.
• Use the tiles to create a shape and calculate its
perimeter. For example, a shape might have a 1 1 1
perimeter of 10 units. 1 1
• Take turns rolling the dice. On each turn: 1 1 1 1 1
– if the number is even, add that many tiles to Perimeter = 10 units
your shape and recalculate the perimeter. 1 1 1
Example: After adding tiles, the perimeter 1 1
becomes 14 units. 1 1
– If the number is odd, remove that many tiles 1 1 1 1
(carefully!) and recalculate the perimeter. 1 1 1
Example: After removing tiles, the perimeter Perimeter = 14 units
becomes 8 units. 1 1 1
• After each turn, write down the new perimeter on 1 1
1 1 1
your score sheet. Perimeter = 8 units
• Play for 5–6 rounds.
At the end of the game, the player with the highest perimeter wins!

179
Perimeter and Area