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Construction of Basic
15 Geometrical Shapes

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 construct a line segment of the given length and a copy of a given line segment
 construct a perpendicular to a line through: a point on it, and a point lying outside it
 construct an angle of a given measure using a ruler and a pair of compasses
 construct a copy of the given angle of unknown measure
 construct the bisector of a given angle
 construct triangles of given measures using different congruence rules

GET READY!

Arohi is a class VII student. Her science teacher assigned a project on Road Safety Day.

Dad! I have to draw some traffic
signal cut-outs in triangular
Hey! What are you shape. So, I am trying to make an
making on this paper? equilateral triangle on the paper.

How can I construct
it using the SSS
congruence rule?
Good. It is easy to draw an
equilateral triangle by using
the SSS congruence rule.

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