Constructions 1 (Edexcel GCSE Maths): Flashcards
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12 cards from this deck
Angle at which perpendicular lines meet
Angle at which perpendicular lines meet
90 degrees (right angles)
Tools allowed for constructing perpendiculars
Tools allowed for constructing perpendiculars
Ruler and compass only (no protractor)
Number of main methods for constructing perpendiculars
Number of main methods for constructing perpendiculars
Three
Method 1: Point P location
Method 1: Point P location
On the line
Method 2: Point P location
Method 2: Point P location
Not on the line (away from it)
What a perpendicular bisector does
What a perpendicular bisector does
Cuts a line segment exactly in half at right angles
Property of points on a perpendicular bisector
Property of points on a perpendicular bisector
Equidistant from both ends of the line segment
Should construction lines be rubbed out?
Should construction lines be rubbed out?
No - must be shown for full marks
Typical marks for construction questions
Typical marks for construction questions
2 marks
Key principle used in all three methods
Key principle used in all three methods
Equal distances
Should compass setting change during a method?
Should compass setting change during a method?
No - keep consistent throughout
Compass setting for perpendicular bisector of AB
Compass setting for perpendicular bisector of AB
More than half the length of AB