BAB 4 :BULATAN II

Arc: Portion of the circumference of a circle.
Lengkuk: Sebahagian daripada lilitan bulatan.

Chord: A straight line joining any two points on the circumference of a circle.
Kord: Garis lurus yang menghubungkan mana-mana 2 titik lilitan bulatan.

Circumference: The perimeter of a circle.
Lilitan: Perimeter sebuah bulatan.

Diameter: Straight line drawn through the centre and terminating at both ways by the circumference.
Diameter: Garis lurus yang merentas pusat bulatan dan menghubungkan 2 titik lilitan bulatan.

Origin: Origin refers to the center of a circle
Pusat: Titik tengah sebuah bulatan.

Pi ( π ): An approximate value is 22/7 which is correct to two decimal places. A more accurate value is 3.14159 which is correct to five decimal places.
Pi: Nilai yang dianggarkan 22/7 atau 3.142.

Radius: The constant distance of every point on the circle from its centre. It is half of the diameter.
Jejari: Garis lurus yang menghubungkan pusat dengan lilitan bulatan. Panjang mana-mana jejari bagi sebuah bulatan adalah sama.

Sector: A sector is that part of a circle, which lies between an arc and two radii joining the extremities of the centre.
Sektor: Sebahagian bulatan yang terletak antara sebuah lengkuk dan dua jejari.

Tangent of a circle: It is a line perpendicular to the radius that touches only one point on the circle.
Tangen: Garis lurus yang berserenjang dengan jejari dan bersentuh hanya di satu titik lilitan bulatan. Formula: Circumference Ukurlilit 2 π r Area of circle Luas bulatan π r 2

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