Question

definition of perpendicular lines, radius of a circle, square.
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Answer 1

HELLO MY DEAR FRIEND 

PERPENDICULAR LINES - THE TWO LINES WHICH MEET AT A POINT AND FORMS AN RIGHT ANGLE ( 90 DEGREES ) THEN THE LINES ARE KNOW AS PERPENDICULAR LINES. 

RADIUS OF CIRCLE - THE LINE WHICH IS DRAWN FROM THE CENTER OF THE CIRCLE TO A POINT OF THE CIRCLE IS KNOW AS RADIUS CIRCLE. 

SQUARE - A SIMPLE CLOSED FIGURE WITH FOUR EQUAL SIDES. AND IT HAS FOUR VERTEXES, FOUR ANGLES, FOUR SIDES.

I HOPE THIS WILL HELP'S U.........*-*

# SWETHAPAVS#

Answer 2

perpendicular lines means two lines which are opposite to each other.

radius of circle means the half length of circle.


square is an closed figure which has four side
each angle are 90 degree and each sides are equal to each other