Combinatorics warmup

Find the total number of quadrilaterals in the given figure.


The answer is 10.

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3 solutions

Abhay Tiwari
Apr 19, 2016

If we try to see the figure in 3d, it will look like a cuboid, 6 \boxed{6} quadrilaterals can be drawn out from there( 6 \boxed{6} faces of the cuboid).

The remaining 4 \boxed{4} are easy to determine.

That makes the total to 10 \boxed{10}

That's wrong it is not stated that the figure is 3d

Aarush Priyankaj - 2 years, 10 months ago
Ashish Menon
Apr 19, 2016

Easy counting reveals that there are 10 10 quadrilaterals.

Lee Sap
Nov 27, 2019

2 large trapeziums (splitting the shape in half), 2 smaller ones (between the squares), 2 squares (created using 2 triangles), and 2 4-sided parallelograms can be created on each half of the whole shape (the small trapezium and one triangle combined)... so 4 parallelograms. Thus, 10 shapes.

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