Circle Vocabulary - Worksheet 4 - 10th Grade

Medium

Identify and describe parts of a circle (Medium)

24 problems · 10-15 minutes · Skills: circles, vocabulary, geometry

About This Worksheet

This medium-level worksheet contains 24 problems designed for 10th Grade students practicing circle vocabulary & properties. Medium worksheets introduce larger numbers and varied question formats to deepen understanding and build fluency.

Every subsequent circle theorem depends on precise knowledge of circle vocabulary. Students who cannot distinguish a chord from a secant, or a central angle from an inscribed angle, will struggle to apply theorems correctly. A solid vocabulary foundation makes all of circle geometry accessible.

  • Identify and label radius, diameter, chord, secant, tangent, arc, and sector
  • Distinguish between minor and major arcs and identify central angles
  • Apply the relationship between diameter and radius to calculate missing lengths
  • Identify semicircles and use them to classify inscribed angles
  • Describe the relationship between a chord and its corresponding arc

How to Solve: Worked Example

Example Problem: A line intersecting a circle at two points is called what?
Solution Steps:
  1. A line touching at exactly one point is a tangent.
  2. A line crossing at two points has a different name.
  3. It is called a secant.
Answer: secant
Tip: A chord has its endpoints on the circle; a secant is the full line that contains a chord.
1
The distance around a circle is called the…
2
Part of a circle between two points is called an…
3
A chord through the centre is called the…
4
What is the angle measure of a full circle?
5
A line through two points of a circle that extends beyond it is a…
6
An arc measuring less than 180° is called a…
7
What is the longest chord of a circle called?
8
Circles sharing the same centre are called…
9
A region bounded by two radii and an arc is called a…
10
What is the set of all points equidistant from a centre called?
11
A line touching a circle at exactly one point is called a…
12
An arc measuring exactly 180° is called a…
13
An arc measuring more than 180° is called a…
14
A line intersecting a circle at two points is called a…
15
A segment joining two points on a circle is called a…
16
The diameter is how many times the radius?
17
Are all radii of the same circle congruent?
18
A segment from the centre to the circle is called a…
19
The distance around a circle is called the…
20
Part of a circle between two points is called an…
21
A chord through the centre is called the…
22
What is the angle measure of a full circle?
23
A line through two points of a circle that extends beyond it is a…
24
An arc measuring less than 180° is called a…

Answer Key

1. circumference2. arc3. diameter4. 360°5. secant6. minor arc7. the diameter8. concentric9. sector10. a circle11. tangent12. semicircle13. major arc14. secant15. chord16. twice17. Yes18. radius19. circumference20. arc21. diameter22. 360°23. secant24. minor arc

Frequently Asked Questions

How do I download this circle vocabulary - worksheet 4 worksheet?

Click the "Download PDF / Print" button at the top of the worksheet. You can save it as a PDF or print it directly. The answer key will be on a separate page.

How do I find worksheets at different difficulty levels?

Each subtopic has 10 worksheets: Worksheets 1-3 are Easy, 4-7 are Medium, and 8-10 are Hard. Start with Easy worksheets to build confidence, then progress to harder ones.

What skills does this circles worksheet cover?

This worksheet focuses on circles, vocabulary, geometry. It is designed for 10th Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

Can I use this worksheet in my classroom?

Yes. All worksheets on K12Worksheets are free for classroom use. You can print copies for your entire class. With 10 worksheets per subtopic at three difficulty levels, you have plenty of options for differentiated instruction and individualized practice.

How many problems are on this worksheet?

This worksheet contains 24 problems. It typically takes 10-15 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.