Maths - Lines & Angles

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A presentation..on lines and angles.You can think of the two sides of the angle as having started side by side, and having opened up to a certain point. When the two sides "open up", they draw an imaginary arc of a circle. Look at the pictures. Illustrate the same with two pens or pencils. Move the one pencil while keeping the other stationary, and "see" how the imaginary circle is drawn in the air while you rotate the other pencil.
You can also think of a sun rising in the morning in the horizon, and gradually getting higher, and traveling through the sky along an arc of a circle.

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Presentation Transcript Presentation Transcript

Slide 1 : Maths Presentation Group No. : Topic : Lines & Angles Members : Teacher's Name :

Slide 2 : “ Lines ” A LINE SEGMENT A LINE A RAY

Slide 3 : A LINE SEGMENT A straight line which links two points without extending beyond them.

Slide 4 : A LINE A geometrical object that is straight, infinitely long and infinitely thin.

Slide 5 : A RAY A portion of a line which starts at a point and goes off in a particular direction to infinity.

Slide 6 : UNDERSTOOD LINE , LINE SEGMENT and RAYS ?? Now Something About Angles....!!

Slide 7 : " ANGLES " TYPES : 1. Acute Angle 2. Obtuse Angle 3. Reflex Angle 4. Straight Angle 5. Right Angle

Slide 8 : Acute Angle !! !!

Slide 9 : OBTUSE ANGLE OBTUSE PART

Slide 10 : RIGHT ANGLE RIGHT ANGLE PART

Slide 11 : REFLEX ANGLE

Slide 12 : Straight Angle

Slide 13 : 90 45 315 0/360 270 135 180 225

Slide 14 : ADJACENT ANGLES 2 1

Slide 15 : 1 2 Supplementary Angles

Slide 16 : ( ) 1 2 VERTICAL ANGLES

Slide 17 : TRANVERSAL

Slide 18 : Summary :

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