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Ratio of areas — the bases carry it, or k² does
The two exam families in one page. Mode 1: cut a triangle — same height, so areas just follow the bases. Mode 2: similar figures — lengths ×k, areas ×k², volumes ×k³ (and the reverse direction exams love). Drag everything.
Same height ⇒ areas ∝ bases
Similar figures: k, k², k³
Split a triangle
Trapezium diagonals
Parallel cut
k given
areas given (reverse)
k
1.50
volumes: on
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