Author: benny varghese

Circle

Class 9-Geometry-Concept of CIRCLE

radius

First of all drag and place the point C(centre) at the desired
position.Tick radius checkbox and adjust radius using slider
for radius Tick draw button and then Click the button
 “Start Animation”Unclick “draw” checkbox and change
 radius and then click “draw” to get concentric circles 
Refresh and Stop buttons can also be used if needed

Benny Varghese 
PGT Maths 
JNV Pathanamthitta

StartAnimation

Stop

AIM: to make clear the concept of
a circle,its centre radius and concentric circles

AIM

How to proceed ?

Refresh

radius = 2 (slider from 0.1 to 5, step 0.1)
C = (4, -1)
Position = 0 (slider from 0 to 360, step 2)
c = Circle(C, radius)
B = Point(c)
P = Rotate(B, Position°, C)
α = Angle(B, C, P)
r = Segment(C, P)
draw = false
b = false
a = false
d: false
e = false