CBSE Class 6 · Computational Thinking · 2026-27
Perimeter and Area: Worksheet
Skills: Decomposition, Abstraction, Pattern recognition. Circle the correct answer. Show your working in the space beside each question.
- What is the perimeter of a rectangle 8 cm long and 5 cm wide?
- What is the area of a square with side 7 cm?
- A 6 cm × 4 cm rectangle has a 2 cm × 2 cm square cut from one corner. What is the area of the shape left?
- For that same L-shape (a 6 cm × 4 cm rectangle with a 2 cm × 2 cm corner square removed), what is the perimeter?
- Each rectangle below has a perimeter of 20 cm. Which has the largest area?
- Ravi walks around a park 50 m long and 30 m wide 3 times. How far does he walk?
Answer key: Perimeter and Area
- (b) 26 cm – Perimeter = 26 cm. (40 is the area in sq cm, a common mix-up.)
- (c) 49 sq cm – Area = 49 sq cm. (28 cm is its perimeter.)
- (b) 20 sq cm – 24 − 4 = 20 sq cm.
- (c) 20 cm – The total is unchanged: 2 × (6 + 4) = 20 cm.
- (d) 5 cm × 5 cm – The 5 × 5 square has the largest area.
- (c) 480 m – 3 × 160 = 480 m.