Explore the corners and turns all around you to learn about angles and different kinds of lines.
An angle is measured in degrees. An angle less than 90° is acute, exactly 90° is a right angle, between 90° and 180° is obtuse, and exactly 180° is a straight angle.
What type of angle is 45°?
Acute angle
What type of angle is 120°?
Obtuse angle
Lines that never meet, no matter how far they extend, are called parallel lines. Lines that cross each other at a right angle are called perpendicular lines.
The two rails of a railway track are an example of which type of lines?
Parallel lines
The corner of a square page is formed by which type of lines?
Perpendicular lines
1. What type of angle is 90°?
2. What type of angle is 180°?
3. What type of angle is 30°?
4. Give one real-life example of parallel lines.
5. Give one real-life example of perpendicular lines.