uses of set square

Play with Set Square

Set square is a triangular piece of transparent plastic with the centre removed and can be seen in every geometry box you purchase. But in most of the cases we are not aware of its uses and in my 15 years of teaching I have never seen any students using it and in some cases I have noticed that students don’t bring these two set in their geometry box.  These set squares come in two usual forms, both right triangles: one with 90-45-45 degree angles, the other with 30-60-90 degree angles. Combining the two forms by placing the hypotenuses together will also yield 15° and 75° angles. 

Set squares are used to draw –

·       Parallel and Perpendicular lines

·       Draw squares, equilateral triangle

·       Rectangles, parallelograms

·       Rhombus

·       Set, square in combination with a T- square is used to draw more accurate angles.

Drawing Parallel Lines

Parallel lines can be drawn using set squares and a ruler. Follow the steps and check

·       Position one edge of Set Square against the ruler and draw a line along the other edge.

·       Move the position of set square while keeping the ruler fixed, draw a line along the same edge done earlier.

 

 

 

 

Drawing Perpendicular Lines

·       Take a ruler and a set square

·       Draw a line AB and take a point P on that where you will draw perpendicular lines

·       Place a set square on point P

·       Draw a line as shown

Drawing Quadrilaterals

Rhombus: - If you take 4 sets of 90- 60 -30 Set square you will get Rhombus

Square: - If you set 2 pieces of 90-45-45 set square you get a Square.

Rectangle: - If you set two 90-30-60 set square and place it accordingly you will get a rectangle.

Parallelogram:- If you place 4 sets of set square in different position as shown below you get a parallelogram.

(Photo credit: - Courtesy – http://www.ekshiksha.org.in/eContent-Show.do?documentId=225)

 

 

 Drawing Rhombus 

Making square 

Making Trapezium