CAT 2019 Slot 1 Quantiative Aptitude | Geometry | Ratio of areas | Questions and Answers

#cat2019
Corners are cut off from an equilateral triangle T to produce a regular hexagon H. Then, the ratio of the area of H to the area of T is
A) 5 : 6
B) 3 : 4
C) 2 : 3
D) 4 : 5
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Best wishes for CAT preparation.

[prospstm]

how did you know that those triangles are equilateral?