1. What is a point? Give examples of a point in real life.
Answer: A point is a precise location in space that has no length, width, or height. Examples: the tip of a pen, the end of a needle, or a dot on paper.
2. What is a line segment? How is it different from a line?
Answer: A line segment is the shortest path between two points and has two endpoints. A line extends indefinitely in both directions and has no endpoints.
3. What is a ray? Give an example.
Answer: A ray starts from a point and extends infinitely in one direction. Example: Sun rays.
4. How is an angle formed?
Answer: An angle is formed when two rays have a common starting point called the vertex.
5. What is the measure of a straight angle?
Answer: A straight angle measures 180°.
6. What are the degree measures of the following types of angles: right angle, straight angle, and reflex angle?
Answer:
Right angle: 90°
Straight angle: 180°
Reflex angle: More than 180° but less than 360°
7. What is a full rotation in terms of degrees?
Answer: A full rotation is 360°.
8. Identify whether the following angles are acute, right, obtuse, or reflex:
a) 45°
b) 120°
c) 180°
d) 270°
Answer:
a) Acute
b) Obtuse
c) Straight
d) Reflex
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