Podcast
Questions and Answers
What is the measure of an angle that is greater than 90° but less than 180°?
What is the measure of an angle that is greater than 90° but less than 180°?
- Right angle
- Acute angle
- Obtuse angle (correct)
- Reflex angle
What is the name of two lines that cross at right angles?
What is the name of two lines that cross at right angles?
- Perpendicular lines (correct)
- Intersecting lines
- Parallel lines
- Congruent lines
What is the measure of an angle that is greater than 180° but less than 360°?
What is the measure of an angle that is greater than 180° but less than 360°?
- Right angle
- Obtuse angle
- Reflex angle (correct)
- Acute angle
What tool is used to measure ∠ABC?
What tool is used to measure ∠ABC?
What are two lines that are the same distance apart called?
What are two lines that are the same distance apart called?
What is the value of the reflex angle ∠EFG?
What is the value of the reflex angle ∠EFG?
What is the total of the angles around a point?
What is the total of the angles around a point?
What is the angle size between each spoke if a bicycle wheel has 8 spokes?
What is the angle size between each spoke if a bicycle wheel has 8 spokes?
If a wheel has an angle of 30o between each spoke, how many spokes does it have?
If a wheel has an angle of 30o between each spoke, how many spokes does it have?
What is the relationship between ∠AED and ∠DEB?
What is the relationship between ∠AED and ∠DEB?
If Kylie rotates 120o, 88o, 112o, and then stops, how many degrees has she rotated in total?
If Kylie rotates 120o, 88o, 112o, and then stops, how many degrees has she rotated in total?
What is the sum of the angles in the diagram a + b + c?
What is the sum of the angles in the diagram a + b + c?
What is the name of an angle that is 90o or a ¼ turn?
What is the name of an angle that is 90o or a ¼ turn?
What is the measure of an angle called?
What is the measure of an angle called?
What is used to measure the size of an angle?
What is used to measure the size of an angle?
What is the name of an angle that is greater than 0o but less than 90o?
What is the name of an angle that is greater than 0o but less than 90o?
What is the name of an angle that is greater than 180o but less than 360o?
What is the name of an angle that is greater than 180o but less than 360o?
What is the symbol used to represent an angle?
What is the symbol used to represent an angle?
Study Notes
Angle Classification
- An angle greater than 90o but less than 180o is an obtuse angle
- An angle greater than 180o but less than 360o is a reflex angle
- An angle of 90o is a right angle
Measuring Angles
- A protractor is used to measure angle size
- Angle size is measured in degrees (o)
Naming Angles
- An angle can be named using three letters, e.g., ∠ABC or ∠CBA
- If there is only one angle at the vertex, a single letter can be used to name the angle, e.g., ∠B
- The vertex of the angle is the point where the arms of the angle meet
Vertically Opposite Angles
- Vertically opposite angles are equal in size
- Example: ∠AED and ∠DEB are vertically opposite angles
Angle Relations
- Two lines that cross at right angles are perpendicular
- Two lines that are the same distance apart are parallel
Drawing Angles
- A protractor can be used to draw angles
- A compass can be used to draw circles
- A straight ruler can be used to draw and measure straight lines
Angle Properties
- Angles around a point add up to 360o
- Example: Kylie rotated through 360o to face the same direction as she started
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Description
Test your understanding of angles and lines with this quiz. Identify types of angles, measure angles using a protractor, and learn about different types of lines. Improve your geometry skills with these questions.
