Mathematics (US) - 0444 CIE

Circumference And Area Of A Circle

Akopọ

The circumference is the distance around a circle and the area is the surface it encloses, both governed by the constant \(\pi\). Extend these to a slice of the circle and you can find an arc length and the area of a sector.

In this lesson you will calculate the circumference and area of a circle, and the arc length and area of a sector, by treating a sector as a simple fraction of the whole circle.

Awọn Afojusun

  1. Calculate the circumference and area of a circle, and the arc length and area of a sector.

Akọ̀wé Ẹ̀kọ́

Circular shapes are everywhere, from wheels to pizzas to clock faces. Knowing the circle formulas, and how a sector is just a fraction of the whole, handles a large slice of measurement problems.

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Oriire fun ipari ẹkọ lori Circumference And Area Of A Circle. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.

Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.

Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.

  1. The circumference of a circle is given by: A. pi r squared B. 2 pi r C. pi r D. 4 pi r Answer: B
  2. The area of a circle is given by: A. 2 pi r B. pi d C. pi r squared D. pi r Answer: C
  3. The area of a circle of radius 7 (pi = 3.142) is about: A. 44.0 B. 153.9 C. 21.99 D. 49 Answer: B
  4. A sector with angle 72 degrees is what fraction of the circle? A. 1/4 B. 1/5 C. 1/6 D. 1/3 Answer: B
  5. Arc length of a sector is the whole circumference multiplied by: A. theta/180 B. theta/360 C. 360/theta D. theta Answer: B

O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
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Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
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O wa lori ohun elo Green Bridge

Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.

Awọn akọsilẹ ẹkọ ni kikun pẹlu awọn aworan apejuwe
Oluranlọwọ ẹkọ ti AI ṣe agbara rẹ
Kọ ẹkọ laisi intanẹẹti, nigbakugba, nibikibi
O wa lori Android, Windows, macOS, ati Linux

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