pls anyone give me all formulas and properties which we should in class 9 of lines and angles chapter pls fast
Answers
Answer:
Properties of Angles
An angle is a figure in which two rays emerge from a common point. This point is called the vertex of the angle and the two rays forming the angle are called its arms or sides.
An angle which is greater than 180 degrees but less than 360 degrees is called a reflex angle.
If two adjacent angles add up to 180 degrees, they form a linear pair of angles. In the following figure, ∠a and ∠b form a linear pair.
Lines And Angles
When two lines intersect each other, the two opposite pairs of angles formed are called vertically opposite angles. In the following figure, ∠A and ∠B are vertically opposite angles. Another pair is ∠C and ∠D.
Lines And Angles
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Frequently Asked Questions on Lines And Angles
What are the five types of Angles?
The five types of angles are:
Acute Angle
Right Angle
Obtuse Angle
Straight Angle
Reflex Angle
What are the properties of Lines and Angles?
If two parallel lines are intersected by a transversal then:
Its vertically opposite angles are always equal
Its corresponding angles are equal
Its alternate exterior and interior angles are equal
What are Lines and its types?
Lines are figures that are made up of infinite points extending indefinitely in both directions. The types of lines are:
Horizontal lines
Vertical lines
Parallel lines
Perpendicular lines