1. Finding the radius and diameter from Circumference
Silent
Teacher
Intelligent Practice
Narration
Your Turn
Circumference = 188cm What’s the diameter?
Circumference = 94cm What’s the diameter?
Circumference = 94cm What’s the radius?
Practice

2. Circumference = 31.4cm What’s the diameter? Circumference = 94.2cm
Worked Example
Your Turn
Circumference = 31.4cm
What’s the diameter?
Circumference = 94.2cm
What’s the diameter?

3. Give your answers to 3sf
Circumference = 18.8cm What’s the diameter?
Circumference = 18.8m What’s the diameter?
Circumference = 188cm What’s the diameter?
Circumference = 94cm What’s the diameter?
Circumference = 94cm What’s the radius?
Circumference = 10cm What’s the diameter?
Circumference = 20cm What’s the radius?
Circumference = 0.2m What’s the radius?
Circumference = 6cm What’s the diameter?
Circumference = 6x cm What’s the diameter?
Circumference = 12x cm What’s the radius?

4. Give your answers to 3sf
Circumference = 18.8cm What’s the diameter? 5.98cm
Circumference = 18.8m What’s the diameter? 5.98m
Circumference = 188cm What’s the diameter? 59.8m
Circumference = 94cm What’s the diameter? 29.9cm
Circumference = 94cm What’s the radius? 15.0cm
Circumference = 10cm What’s the diameter? 3.18cm
Circumference = 20cm What’s the radius? 3.18cm
Circumference = 0.2m What’s the radius? m
Circumference = 6cm What’s the diameter? 1.91cm
Circumference = 6x cm What’s the diameter? 1.91x cm
Circumference = 12x cm What’s the radius? 1.91x cm