Mathematics (9-1) - 0980 CIE

Geometrical Terms

Gbogbo ọrọ náà

Geometry has its own precise vocabulary, and getting that vocabulary right is the difference between a confident answer and a confused one. A vertex is not just a corner, a chord is not the same as a diameter, and congruent means something quite different from similar. Once the words are exact, the shapes start to make sense.

In this lesson you will build the language of geometry from the ground up: points and lines, the four kinds of angle, the families of triangles and quadrilaterals, polygons and their nets, and every part of a circle from its centre to its segment. No drawing is needed here, only clear definitions you can rely on for the rest of the course.

Ebumnobi

  1. Use and interpret the following geometrical terms: point vertex line parallel perpendicular bearing right angle acute, obtuse and reflex angles interior and exterior angles similar congruent scale factor.
  2. Use and interpret the vocabulary of: triangles special quadrilaterals polygons nets simple solids.
  3. Use and interpret the vocabulary of a circle.
  4. Use and interpret the following geometrical terms: point vertex line plane parallel perpendicular perpendicular bisector bearing right angle acute, obtuse and reflex angles interior and exterior angles similar congruent scale factor. (Extended only)
  5. Use and interpret the vocabulary of: triangles special quadrilaterals polygons nets solids. (Extended only)

Nkuzi Olu

Gee ntị na nkuzi a na ngwa

Maapụ uche

E seela isiokwu a ka ị hụ otu echiche si ejikọta.

Mepee maapụ uche na ngwa

Kaadị ncheta

Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.

Mee omume kaadị ndị a na ngwa

Akwụkwọ Ọmụmụ

Every geometry question is written in this vocabulary, so a single misunderstood word can cost a whole answer. When a question says the triangle is isosceles, or asks for the exterior angle, or names a tangent to a circle, it is handing you information for free, but only if you know what the word means. Mastering these terms now makes every later topic, from angles to constructions to circle theorems, far easier to follow.

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Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Geometrical Terms. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. Two lines that meet at exactly 90 degrees are described as: A. parallel B. perpendicular C. acute D. reflex Answer: B
  2. An angle of 210 degrees is best described as: A. acute B. obtuse C. reflex D. right Answer: C
  3. A triangle with all three sides equal is called: A. scalene B. isosceles C. equilateral D. right-angled Answer: C
  4. A straight line that touches a circle at exactly one point is a: A. chord B. tangent C. radius D. arc Answer: B
  5. A 3 cm by 5 cm rectangle is enlarged to 9 cm by 15 cm. The two rectangles are: A. congruent B. similar C. neither D. equilateral Answer: B

Rue ajuju ndi a n'ime ngwa ahu

Rue ajuju ndi a n'ime ngwa ahu

Meecha Ajụjụ Ule Ọmarịcha

Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Geometrical Terms? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.

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