Maths Dictionary · JSS 3
Congruent
Simple meaning
Exactly the same shape AND the same size.
Example
Two ₦50 notes are congruent rectangles: one fits exactly on top of the other.
See it
From the Similar Triangles lesson. Try moving things around.
Angles in both: ∠A = ∠P = 55.8°, ∠B = ∠Q = 82.8°, ∠C = ∠R = 41.4°
PQAB= 84 = 2
QRBC= 105 = 2
RPCA= 126 = 2
Every pair of matching sides gives the same number: the scale factor.
Scale factor2