Chapter 2 · Class 6 CBSE · Formula Sheet

Lines & Angles Formulas — Class 6 CBSE

Explore points, rays, line segments, and measure and classify different types of angles.

Key Formulas

Types of Angles

\text{Acute: } 0° < \theta < 90°, \quad \text{Right: } \theta = 90°, \quad \text{Obtuse: } 90° < \theta < 180°

Straight Angle

\theta = 180°

Complementary Angles

\angle A + \angle B = 90°

Supplementary Angles

\angle A + \angle B = 180°

Vertically Opposite Angles

\angle 1 = \angle 3, \quad \angle 2 = \angle 4

Worked Examples

1Using: Supplementary Angles

If one angle is 65 degrees, find its supplement.

Step 1: Supplement = 180 - 65

Step 2: = 115 degrees.

Answer: 115 degrees

2Using: Vertically Opposite

Two lines intersect. If one angle is 40 degrees, find the vertically opposite angle.

Step 1: Vertically opposite angles are equal.

Step 2: The angle = 40 degrees.

Answer: 40 degrees

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Frequently Asked Questions

How many formulas are in Class 6 CBSE Lines & Angles?+
There are 5 formulas in the Lines & Angles chapter for Class 6 CBSE. Each formula is essential for solving problems in this topic.
How to remember Lines & Angles formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Lines & Angles formulas enough for exams?+
Yes, these formulas cover the complete CBSE Class 6 syllabus for Lines & Angles. Practice applying them to different types of questions for full exam readiness.

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