2 questions · CET 2025–2026 · Easy 2 · Medium 0 · Hard 0. Newest paper first. Full papers
An angle that is less than 360° and more than 180° is called
Answer: C official key
Approach: Angle classification by size.
Solution:
Acute < 90°, right = 90°, obtuse 90°–180°, straight = 180°.
Between 180° and 360° → reflex angle; 360° → complete angle.
Why the other options are wrong:
A (< 90°) and B (90°–180°) are too small; D is exactly 360°; E is a pair summing to 90°.
Answer: C
The interior angle of a regular polygon exceeds the exterior angle by 132°. Then the number of sides in the polygon is
Answer: A
Approach: Interior + exterior = 180°, and exterior angle = 360°/n for a regular polygon.
Solution:
Let exterior = x → interior = 180 − x
(180 − x) − x = 132 → x = 24°
n = 360/24 = 15
Why the other options are wrong:
B (18) gives exterior 20°, difference 140°.
C (20) → 18°, difference 144°.
D (12) → 30°, difference 120°.
E (25) → 14.4°, difference 151.2°.
Cetking shortcut: Exterior = (180 − 132)/2 = 24° → n = 15.
Answer: A
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