This math topic focuses on understanding the relationship between the diameter and radius of a circle. Each problem presents a circle’s diameter 'd' and asks learners to determine the corresponding radius 'r'. Options include mathematical relations such as 'r' being half, the same, or twice the diameter, among other incorrect distractors. The problems are designed to reinforce the basic geometric rule that the radius is half the diameter. This concept is part of an introductory unit on circle geometry.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Circles - Rule to Find Radius from Diameter - Simple
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If 'd' is the diameter, what is the radius 'r'?
Circles - Rule to Find Radius from Diameter - Simple Worksheet
| Math worksheet on 'Circles - Rule to Find Radius from Diameter - Simple (Level 2)'. Part of a broader unit on 'Geometry - Circle Concepts - Intro' Learn online: app.mobius.academy/math/units/geometry_circles_concept_intro/ |
1
| If 'd' is the diameter, what is the radius 'r'? |
a
| r is half of d |
b
| r is the same as d |
c
| Nothing, r and d are not related |
d
| r and d add to 180 |
e
| r is twice d |
f
| r and d add to 90 |
2
| If 'd' is the diameter, what is the radius 'r'? |
a
| r and d add to 90 |
b
| r is half of d |
c
| Nothing, r and d are not related |
d
| r and d add to 360 |
e
| r and d add to 180 |
f
| r is twice d |
3
| If 'd' is the diameter, what is the radius 'r'? |
a
| r and d add to 360 |
b
| r is twice d |
c
| r is the same as d |
d
| Nothing, r and d are not related |
e
| r and d add to 180 |
f
| r is half of d |
4
| If 'd' is the diameter, what is the radius 'r'? |
a
| r is twice d |
b
| r and d add to 90 |
c
| r and d add to 360 |
d
| r is half of d |
e
| r and d add to 180 |
f
| Nothing, r and d are not related |
5
| If 'd' is the diameter, what is the radius 'r'? |
a
| r is the same as d |
b
| Nothing, r and d are not related |
c
| r and d add to 90 |
d
| r is half of d |
e
| r and d add to 180 |
f
| r is twice d |
6
| If 'd' is the diameter, what is the radius 'r'? |
a
| r and d add to 360 |
b
| r is half of d |
c
| r is the same as d |
d
| Nothing, r and d are not related |
e
| r and d add to 180 |
f
| r and d add to 90 |
7
| If 'd' is the diameter, what is the radius 'r'? |
a
| Nothing, r and d are not related |
b
| r is half of d |
c
| r and d add to 90 |
d
| r and d add to 360 |
e
| r is the same as d |
f
| r is twice d |