Basic Details
Word: Radii
Part of Speech: Noun
Meaning: The plural of radius; it refers to the distance from the centre of a circle to its edge or the line segment connecting the centre of a circle to a point on its circumference.
Synonyms: Lines, distances
Antonyms: N/A
Idioms and Phrases
- Spread out like radii: Used to describe things that are branching out in different directions from a central point. Example: "The branches of the tree spread out like radii, reaching towards the sun."
- Circle of friends: Referring to a group of friends who all connect back to a central person or idea. Example: "She has a circle of friends radii around her, each of them adding to her happiness."
Usage Examples
Example 1: In geometry class, we learned that a circle is divided into multiple parts by radii extending from the centre.
Example 2: The artist drew multiple radii from the centre of the painting, creating a beautiful starburst effect.
Example 3: To calculate the area of the circle, we used the formula that involves its radius and the lengths of the radii.
Fun Fact
Did you know that the word "radius" comes from the Latin word "radius," which means "ray" or "spoke"? This reflects how the radius extends out like a ray from the centre of a circle!
Famous Quote
"In every walk with nature, one receives far more than he seeks." John Muir. This quote reminds us that just as radii extend outward, our experience in nature can broaden our understanding of the world.
Multiple Choice Questions (MCQs)
1. What does "radii" mean?
a) The edges of a circle
b) The distance from the centre to the edge of a circle
c) A type of animal
d) A colour pattern
Answer: b) The distance from the centre to the edge of a circle
2. Which of these is a synonym of "radii"?
a) Angles
b) Lines
c) Points
d) Shapes
Answer: b) Lines
3. What is the opposite term of "radii" in the context of this definition?
a) N/A
b) Diameter
c) Triangle
d) Arc
Answer: a) N/A
4. Which sentence correctly uses the term "radii"?
a) The radii of the wheel broke.
b) The bike has radii that make it easy to turn.
c) The radii of the circle stretch from the centre to its edge.
d) The radii were too heavy to lift.
Answer: c) The radii of the circle stretch from the centre to its edge.
5. Which idiom relates to the idea of "radii"?
a) Circle of friends
b) Walk the line
c) Reach for the stars
d) Cutting corners
Answer: a) Circle of friends
