Constructions (Using Ruler and Compass only)
ICSE · Class 8 · Mathematics
All formulas from Constructions (Using Ruler and Compass only) in ICSE Class 8 Mathematics. Key equations, constants, and identities for board exam preparation.
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Formulas
Basic Angle Constructions
∠ABP = ∠PBC = 1/2 ∠ABC
∠PBC = 1/2 ∠ABC = 1/2 × 60° = 30°
∠ABC = ∠ABO = 90°/2 = 45°
∠ABC = 90°
Bisector of a Line Segment and Perpendicular Bisector
OB = OC = 1/2 BC
OB = OC = 1/2 BC
OB = OC and ∠POC = 90°
Perpendicular to a Line
∠OPA = ∠OPB = 90°
∠AOP = ∠BOP = 90°
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