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LinesAnd Angles By K.V.Prasad, AECS-4, Mumbai

Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

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Page 1: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Lines AndAnglesBy

K.V.Prasad,

AECS-4,

Mumbai

Page 2: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Lines and angles

• Introduction

• Angles In Daily Life

• Basic Terms And Definitions

• Points

• Intersecting Lines And Non Intersecting Lines

• Perpendicular Lines

• Angles

• Parallel Lines And ATransversal

Page 3: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Introduction

• In math geometry the lines and angles are important tools. If any object in ideal, that is called as line and it is represented as straight curve.

• The angle is related with line that is the cross-section of two-line is create the angle and that intersection point is called as vertex. Here we see about types of line and angle in math.

Page 4: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Angles in dailylife

If we look around us, we will see angles everywhere.

Page 5: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Basic Terms AndDefinition

•LINE: A straight path extending in both directions with no endpoints

•LINE SEGMENT: A part of a line that includes two points, called endpoints, and all the points between them

•RAY: A part of a line, with one endpoint, that continues

without end in one direction

Page 6: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

POINTS

Page 7: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Intersecting Lines And Non IntersectingLines

Intersecting Lines : Lines that cross each other.

Non Intersecting lines : Lines that never cross and are

always the same distance apart. They are also called parallel

lines.

Page 8: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Examples Of Non Intersecting Lines

• Hardwood Floor

• Opposite sides of windows, desks, etc.

• Parking slots in parking lot

• Parallel Parking

Page 9: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Perpendicularlines

Two lines that intersect to form four right angles

Page 10: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Examples Of Perpendicular Lines

•Window Panes•Streets Of Cities

Page 11: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Angles

In geometry, an angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. The magnitude of the angle is the "amount of rotation" that separates the two rays, and can be measured by considering the length of circular arc swept out when one ray is rotated about the vertex to coincide with the other.

•Acute Angle

•Right Angle

•ObtuseAngle

•Straight angle

•Reflex Angle

•Adjacent Angles

•Linear Pair OfAngles

•Vertically OppositeAngles

Page 12: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Acute Angles

The measure of an angle with a measure between 0° and 90°.

Page 13: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Examples Of AcuteAngles

Page 14: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Right angle

An angle formed by the perpendicular intersection of two straight lines; an angle of 90°.

Page 15: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Examples Of Right Angle

Page 16: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Obtuse Angle

Angle measures greater than 90 degrees but less than 180 degrees.

Page 17: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Examples Of Obtuse Angle

Page 18: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Straight Angle

A straight angle changes the direction to point the opposite way. It looks like a straight line. It measures 180° (half a revolution, or two right angles)

Page 19: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Examples Of Straight Angle

Page 20: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Reflex Angle

A Reflex Angle is more than 180° but less than 360°

Page 21: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Adjacent Angles

In geometry, adjacent angles, often shortened as adj. ∠s, are angles that have a common ray coming out of the vertex

going between two other rays. In other words, they are angles that are side by side, or adjacent.

Page 22: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Linear Pair Of Angles

A pair of adjacent angles formed by intersecting lines. Linear pairs of angles are supplementary.

Page 23: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Vertically opposite Angle

In geometry, a pair of angles is said tobe vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed from twointersecting lines and the angles are not adjacent. They all share avertex. Such angles are equal in measure and can be describedas congruent.

Page 24: Lines And Angles · In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ∠s ) if the angles are formed

Thankyou