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Gyaan Maths
CBSE · Class 6-10
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CBSE Maths · Class 6

Chapter 5: Understanding Elementary Shapes

Name: ________________________
Date: ______________
Marks: ____ / 10

Measuring line segments and angles; perpendicular and parallel lines; classification of triangles and quadrilaterals; 3D shapes.

Questions

  1. Classify triangle with angles 70∘,60∘,50∘70^\circ, 60^\circ, 50^\circ.
  2. Edges of a cube.
  3. Angle traced by the minute hand in 1010 minutes.
  4. How many faces does a cube have?
  5. Verify Euler's formula for a cube.
  6. A right angle equals what?
  7. Number of vertices of a cuboid.
  8. Triangle with two equal sides is called?
  9. Reflex angle is more than?
  10. How many edges does a triangular prism have?

Extra Practice (Optional)

  • Number of faces of a triangular prism.
  • Which quadrilateral has all sides equal and all angles 90∘90^\circ?
  • Sum of angles in a quadrilateral?

Answer Key (For Teachers)

  1. Answer: Acute, scalene.
    Working: All angles <90∘< 90^\circ; all different.
  2. Answer: 1212.
    Working: A cube has 1212 edges.
  3. Answer: 60∘60^\circ.
    Working: 360∘360^\circ in 6060 min ⇒6∘\Rightarrow 6^\circ per min.
  4. Answer: 66
    Working: Six square faces.
  5. Answer: Verified.
    Working: F=6,V=8,E=12F=6, V=8, E=12; 6+8−12=26+8-12 = 2.
  6. Answer: 90∘90^\circ
    Working: Quarter of full turn.
  7. Answer: 88
    Working: 88 corners.
  8. Answer: Isosceles.
    Working: Definition.
  9. Answer: 180∘180^\circ
    Working: Greater than a straight angle.
  10. Answer: 99
    Working: 3+3+3=93 + 3 + 3 = 9.
Gyaan Maths · CBSE Class 6 · Chapter 5
Gyaan Maths — CBSE Class 6-10, built for board-toppers.
v1.1 · Feb 2026