The content is just an excerpt from the complete note for JSS2 Second Term Basic Technology Lesson Note – Quadrilaterals and Polygons. Check below to download the complete PDF

WEEK THREE

CLASS:  JS TWO

WEEK:   THREE           

TOPIC: QUADRILATERALS AND POLYGONS

SUB-TOPICS:

  • Quadrilateral
  • Regular and Irregular Polygons

Content Development (NOTES FOR FIRST LESSON/PERIOD ONE)

Sub-Topic I:     QUADRILATERAL

What is a Quadrilateral?

A quadrilateral is a plane figure bounded by four straight sides and whose four angles add up to 3600. The line joining two opposite corners of quadrilateral is known as diagonal.

Examples of Quadrilateral

  1. Squares
  2. Rectangle
  3. Parallelogram
  4. Rhombus
  5. Trapezium
  6. Kite etc.

Construction of A Square

E.g.: How to construct a square given that one of its sides is 60mm

Procedures

  1. Draw the given side AB to be 60 mm.
  2. With centre A and a convenient radius, draw a semicircle at A. use the semicircle to draw a vertical line at AC
  3. With center A and a radius AB, draw an ardc to cut the vertical line at D with center B and with the same radius, draw an arc at C. Again, with center Dand the same radius, draw another arc to cut the one at C.
  4. Join point D to C and C to B. ABCD is the square required.

 To gain full access to the note: DOWNLOAD FILE

Copyright warnings! Do not copy.