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Theorems related to Interior Angles Video Lecture | Crash Course for Class 9 (English)

FAQs on Theorems related to Interior Angles Video Lecture - Crash Course for Class 9 (English)

1. What are interior angles?

Ans. Interior angles are the angles formed inside a polygon by two adjacent sides. They are measured in degrees and their sum depends on the number of sides of the polygon.

2. How can I calculate the measure of an interior angle?

Ans. To calculate the measure of an interior angle in a regular polygon, you can use the formula: (n-2) x 180° / n, where n represents the number of sides of the polygon.

3. What is the relationship between interior angles and exterior angles?

Ans. The sum of an interior angle and its corresponding exterior angle is always 180°. In other words, the interior angle and the exterior angle are supplementary.

4. Can interior angles be negative?

Ans. No, interior angles cannot be negative. They are always measured as positive angles, ranging from 0° to 180°.

5. How are interior angles related to parallel lines?

Ans. When a transversal intersects two parallel lines, the interior angles on the same side of the transversal are called consecutive interior angles. These angles are always equal.

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Sep 10, 2025 Last updated

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