What's diameter?
a straight line goes from one side to the opposite side of a circle and passes through the center
Calculate the diameter when r = 50cm
d= r . 2 = 50 . 2 = 100cm
It is a flat shape with four 90° angles and four sides, with opposite sides of equal length. What shape is it?
rectangle
Shapes fitting together without any gaps are called ___________.
tessellation
What's radius?
a straight line joining the centre of a circle to its edge
What is the radius of this cirle? (d = 40cm)
r = d/2 = 40/2 = 20cm
This shape has 3 straight sides and 3 vertices. Which shape is it?
triangle
What's the distance around a circle called?
Circumference
I am a flat shape with five straight sides. Who am I?
pentagon
Lines that are the same distance apart all the way along their length.
parallel