Chapter-4 Quadrilaterals — Online MCQ Test
MATHS · Grade 8 · CBSE(NCERT)
Practice Chapter-4 Quadrilaterals with a free chapter-wise online MCQ test.
This chapter covers: polygons - diagonals - convex polygon - concave polygon - regular polygon - angle sum property - parallelogram - rhombus - rectangle - square - kite.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-4 Quadrilaterals — Important Questions & Answers
A quadrilateral is a polygon with how many sides?
- A. 3 sides
- B. 4 sides
- C. 5 sides
- D. 6 sides
Answer: B. 4 sides
By definition, a quadrilateral is a polygon with exactly 4 sides and 4 vertices.
By definition, a quadrilateral is a polygon with exactly 4 sides and 4 vertices.
What is the sum of all interior angles of a quadrilateral?
- A. 180°
- B. 270°
- C. 360°
- D. 540°
Answer: C. 360°
The angle sum property of a quadrilateral states that the sum of all interior angles is always 360°.
The angle sum property of a quadrilateral states that the sum of all interior angles is always 360°.
If three angles of a quadrilateral are 85°, 95°, and 100°, what is the fourth angle?
- A. 70°
- B. 80°
- C. 85°
- D. 90°
Answer: B. 80°
Using the angle sum property: Fourth angle = 360° - (85° + 95° + 100°) = 360° - 280° = 80°.
Using the angle sum property: Fourth angle = 360° - (85° + 95° + 100°) = 360° - 280° = 80°.
In quadrilateral ABCD, if the diagonals AC and BD bisect each other, which type of quadrilateral must it be?
- A. A kite
- B. A trapezium
- C. A parallelogram
- D. A rectangle
Answer: C. A parallelogram
The key property that diagonals bisect each other is characteristic of a parallelogram; other quadrilaterals may not have this property.
The key property that diagonals bisect each other is characteristic of a parallelogram; other quadrilaterals may not have this property.
In a kite ABCD with AB = AD and CB = CD, if angle BAD = 80°, angle BCD can be determined to be:
- A. 80°
- B. 100°
- C. 160°
- D. Cannot be determined without more information
Answer: D. Cannot be determined without more information
In a kite, knowing one angle is insufficient. The angles depend on the specific dimensions. Angle BCD cannot be uniquely determined from angle BAD alone.
In a kite, knowing one angle is insufficient. The angles depend on the specific dimensions. Angle BCD cannot be uniquely determined from angle BAD alone.