Q1
What is a line segment?
AA line with two endpoints
BA line with one endpoint
CA line with no endpoints
DA curved shape
ICSEClass 7 (ICSE)MathematicsCh 13 · Topic 2
Practice and Revision - Lines and Angles (Including Construction of Angles)
Let us practise and revise what we learned about lines and angles (including construction of angles). Lines and angles form the basis of geo
Core concept
A line segment has two endpoints, a ray has one endpoint extending infinitely, and a line extends infinitely in both directions.
How it works
Angles are classified by their measure - acute (less than 90°), right (exactly 90°), obtuse (between 90° and 180°), and straight (180°).
Why it matters
We construct angles accurately using a protractor to measure the desired degree, or a compass for specific standard angles like 60°.
Key detail
Understanding lines and angles is fundamental for constructing shapes and solving geometric problems accurately.
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Quick notes
• A line segment has two endpoints.
• A ray has one endpoint, extends infinitely.
• A line extends infinitely both ways.
• Acute angles are less than 90°.
• Right angles are exactly 90°.
• Obtuse angles are between 90° and 180°.
• We use a protractor to construct angles.
• A compass helps construct standard angles like 60°.