Composite Figures
A composite figure is made by joining or removing two or more familiar shapes.
Practice This ConceptMain explanation
Teacher explanation
To find its area or perimeter, break the figure into known parts such as rectangles, triangles, semicircles, or sectors. Add areas for joined parts and subtract areas for cut-out parts.
Example
A rectangle of 20 cm by 10 cm has a semicircle of radius 5 cm removed. Required area = rectangle area - semicircle area.
Simple analogy
Break the figure, solve the pieces, then join the answers with correct signs.
Common confusion
Students add every visible number without deciding whether a part is added or removed.
Exam tip
Shade or mark the required region and write plus or minus signs before calculation.
Answer writing and exam use
1-mark use
Write the exact meaning of composite figures in one clean line.
2-mark use
Define composite figures and add one example or condition.
3-mark use
Explain composite figures, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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