Miss Tan decorated the notice board using cards that are 7 cm by 10 What was the area of the notice board not covered by the cords?

To determine the area of the notice board not covered by the cards, we need to know two things: the total area of the notice board and the total area covered by the cards. 1. **Calculate the area of one card:** The area of a rectangle is calculated using the formula: \[ \text{Area} = \text{length} \times \text{width} \] For the cards that are 7 cm by 10 cm: \[ \text{Area of one card} = 7 \, \text{cm} \times 10 \, \text{cm} = 70 \, \text{cm}^2 \] 2. **Determine the total area of the notice board:** We need the dimensions of the notice board to calculate its area. If you provide the dimensions of the notice board, I can help you calculate the area not covered by the cards. 3. **Calculate the area covered by the cards:** If you know how many cards were used, you can calculate the total area covered by the cards by multiplying the area of one card by the number of cards: \[ \text{Total area covered} = \text{Area of one card} \times \text{Number of cards} \] 4. **Calculate the area not covered by the cards:** Finally, subtract the total area covered by the cards from the total area of the notice board: \[ \text{Area not covered} = \text{Total area of notice board} - \text{Total area covered} \] Please provide the dimensions of the notice board and the number of cards used, and I can help you find the area not covered by the cards.