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Telangana TET Paper 1 Exam Model Paper 5

Section: Mathematics

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Question : 91 of 150

Marks: +1, -0

Identify the WRONG statement.

1) In a regular polygon all side are equal.

2) All its interior angles are equal.

3) Sum of its exterior angles is 360º.

4) Sum of its interior angles is (n - 2) × 360º.

Statement 4
Statement 1
Statement 3
Statement 2

Solution:

Concept:

A regular polygon has equal sides and equal angles. The sum of interior angles is

(n-2)\times 180^\circ

, not

360^\circ

.

Explanation:

Statement 1 and 2 are correct definitions of a regular polygon.

Statement 3 is correct: sum of exterior angles of any polygon is always

360^\circ

.

Statement 4 says sum of interior angles is

(n-2)\times 360^\circ

.

But the correct formula is

(n-2)\times 180^\circ

.

Hence, statement 4 is wrong.

Answer:

Option A: Statement 4

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