Square root spiral project hanďmade
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NCERT Class 9 Maths Lab Manual – Construct a Square Root Spiral
August 24, 2018 by Mereena Leave a Comment
NCERT Class 9 Maths Lab Manual – Construct a Square Root Spiral
OBJECTIVE
To construct a square root spiral.
Materials Required
Adhesive
Geometry box
Marker
A piece of plywood
Prerequisite Knowledge
Concept of number line.
Concept of irrational numbers.
Pythagoras theorem.
Theory
A number line is a imaginary line whose each point represents a real number.
The numbers which cannot be expressed in the form p/q where q ≠ 0 and both p and q are integers, are called irrational numbers, e.g. √3, π, etc.
According to Pythagoras theorem, in a right angled triangle, the square of the hypotenuse is equal to the sum of the squares of other two sides containing right angle. ΔABC is a right angled triangle having right angle at B. (see Fig. 1.1)
Therefore, AC² = AB² +BC²
where, AC = hypotenuse, AB = perpendicular and BC = base
Procedure
Take a piece of plywood having the dimensions 30 cm x 30 cm.
Draw a line segment PQ of length 1 unit by taking 2 cm as 1 unit, (see Fig. 1.2)
Step-by-step explanation:
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