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Properties of Angles and Lines - 2 Video Lecture | Mathematics Class 6 ICSE
FAQs on Properties of Angles and Lines - 2 Video Lecture - Mathematics Class 6 ICSE
| 1. What are angles and how are they classified? |  |
Ans. Angles are formed when two rays originate from a common point, called the vertex. They are classified based on their measure in degrees: acute angles (less than 90°), right angles (exactly 90°), obtuse angles (between 90° and 180°), straight angles (exactly 180°), and reflex angles (greater than 180° but less than 360°).
| 2. How do you measure an angle? | |
Ans. Angles are measured using a protractor. To measure an angle, place the midpoint of the protractor at the vertex of the angle and align one ray along the baseline of the protractor. Then, read the measurement on the scale where the other ray intersects.
| 3. What is the sum of angles in a triangle? | |
Ans. The sum of the interior angles in a triangle is always 180 degrees. This means that if you know the measure of two angles in a triangle, you can find the third angle by subtracting the sum of the known angles from 180°.
| 4. What is a complementary angle? | |
Ans. Complementary angles are two angles whose measures add up to 90 degrees. For example, if one angle measures 30°, its complementary angle would measure 60° because 30° + 60° = 90°.
| 5. How are angles used in real life? | |
Ans. Angles are used in various real-life applications, including architecture, engineering, navigation, and sports. For instance, architects use angles to design buildings, while navigators use them to determine directions on maps. Angles also play a crucial role in sports, such as when athletes calculate the best angles for throwing or kicking a ball.
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Oct 23, 2025
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