Question

which of the following is not a regular polygon

A) equilateral triangle
B) square
C) rectangle
D) None of these

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Answer 1

Answer:

(c) rectangle

Step-by-step explanation:

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Answer 2

Given:

To find the regular polygon from -

A) equilateral triangle

B) square

C) rectangle

D) None of these

Solution:

Know that, A polygon with equal side and angle is known as regular polygon.

Therefore,

Check the options:

A) Equilateral triangle : All sides are equal and each interior angle is of $\[60^\circ \]$.  so that an Equilateral triangle is a regular polygon.

B) Square : All sides are equal and each interior angle is of $\[90^\circ \]$.  so that a square is a regular polygon.

C) Rectangle : The opposite sides are equal but the adjacent sides are not equal and each interior angle is of $\[90^\circ \]$.  so that a rectangle is not a regular polygon.

Hence, Rectangle is not a regular polygon.