alleryWhat is the least angle of turn that makes a square look unchanged?
A360 degrees
B45 degrees
C180 degrees
D90 degrees
Answer & Solution
Correct answer: D. 90 degrees
1. Rotate a square about its center.
2. After a quarter turn each corner lands on the next corner.
3. So the smallest turn is 90 degrees.
_Source: Wikipedia, Rotational symmetry (CC BY-SA 4.0), Rotational symmetry_
Keep practising Shapes and Spatial Understanding
Browse all Shapes and Spatial Understanding questions for CTET, or explore more Mathematics topics.
Related questions
Fold a regular pentagon so the halves match. How many different folds work?In a 3 x 3 grid with Row 1 at the bottom, where is the item in row 3, column 2?On a grid, Mini takes 4 steps right, then 2 steps left, then 1 step up. Where is she compaA map scale says 1 cm stands for 5 km. Two towns are 4 cm apart on the map. How far apart Facing the setting Sun, which direction is your right hand pointing?Turn an equilateral triangle about its center; it first looks unchanged after how many degA regular hexagon looks unchanged after a turn of at least how many degrees?A regular pentagon cannot tile a floor on its own. Why?