0580 · Notes & worked examples
Check a final answer, then explain the reasoning on paper. Guest progress stays in this browser; an account saves future checks without overwriting your first result.
Recall
Maths4U Original · Short practice
From the top-right corner of a 13 cm by 13 cm rectangle, remove a 5 cm wide by 4 cm high rectangular notch. The remaining figure is L-shaped.
Find the removed area in \(\displaystyle \mathrm{cm}^{2}\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
From the top-right corner of a 14 cm by 8 cm rectangle, remove a 2 cm wide by 2 cm high rectangular notch. The remaining figure is L-shaped.
Find the removed area in \(\displaystyle \mathrm{cm}^{2}\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Method
Maths4U Original · Short practice
From the top-right corner of a 14 cm by 8 cm rectangle, remove a 2 cm wide by 2 cm high rectangular notch. The remaining figure is L-shaped.
Find the remaining area in \(\displaystyle \mathrm{cm}^{2}\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
From the top-right corner of a 15 cm by 9 cm rectangle, remove a 3 cm wide by 3 cm high rectangular notch. The remaining figure is L-shaped.
Find the remaining area in \(\displaystyle \mathrm{cm}^{2}\).
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Apply
Maths4U Original · Short practice
From the top-right corner of a 15 cm by 9 cm rectangle, remove a 3 cm wide by 3 cm high rectangular notch. The remaining figure is L-shaped.
Find the length of the remaining top horizontal edge in cm.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
From the top-right corner of a 10 cm by 11 cm rectangle, remove a 5 cm wide by 2 cm high rectangular notch. The remaining figure is L-shaped.
Find the length of the remaining top horizontal edge in cm.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Check understanding
Maths4U Original · Short practice
From the top-right corner of a 16 cm by 10 cm rectangle, remove a 4 cm wide by 4 cm high rectangular notch. The remaining figure is L-shaped.
Find the external perimeter of the L-shape in cm.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.
Fresh review variant
Maths4U Original · Short practice
From the top-right corner of a 10 cm by 11 cm rectangle, remove a 5 cm wide by 2 cm high rectangular notch. The remaining figure is L-shaped.
Find the external perimeter of the L-shape in cm.
Enter one exact number or fraction unless the question specifies rounding. If it asks for a coefficient of π, enter that coefficient only. Give full reasoning separately for written problems.