Geometrical Terms
Overview
Geometry has its own precise vocabulary, and getting that vocabulary right is the difference between a confident answer and a confused one. A vertex is not just a corner, a chord is not the same as a diameter, and congruent means something quite different from similar. Once the words are exact, the shapes start to make sense.
In this lesson you will build the language of geometry from the ground up: points and lines, the four kinds of angle, the families of triangles and quadrilaterals, polygons and their nets, and every part of a circle from its centre to its segment. No drawing is needed here, only clear definitions you can rely on for the rest of the course.
Objectives
- Use and interpret the following geometrical terms: point vertex line parallel perpendicular bearing right angle acute, obtuse and reflex angles interior and exterior angles similar congruent scale factor.
- Use and interpret the vocabulary of: triangles special quadrilaterals polygons nets simple solids.
- Use and interpret the vocabulary of a circle.
- Use and interpret the following geometrical terms: point vertex line plane parallel perpendicular perpendicular bisector bearing right angle acute, obtuse and reflex angles interior and exterior angles similar congruent scale factor. (Extended only)
- Use and interpret the vocabulary of: triangles special quadrilaterals polygons nets solids. (Extended only)
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Geometrical Terms. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Two lines that meet at exactly 90 degrees are described as: A. parallel B. perpendicular C. acute D. reflex Answer: B
- An angle of 210 degrees is best described as: A. acute B. obtuse C. reflex D. right Answer: C
- A triangle with all three sides equal is called: A. scalene B. isosceles C. equilateral D. right-angled Answer: C
- A straight line that touches a circle at exactly one point is a: A. chord B. tangent C. radius D. arc Answer: B
- A 3 cm by 5 cm rectangle is enlarged to 9 cm by 15 cm. The two rectangles are: A. congruent B. similar C. neither D. equilateral Answer: B
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
Practice Mock Questions
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