This math topic focuses on understanding the relationship between the diameter and radius of circles. It primarily tests the ability to identify that the radius is half the diameter of a circle. Each question presents a diagram of a circle with labeled points and asks what is known about the radius given the diameter. The possible answers vary, with the correct answer typically being that the radius is half of the diameter. This set of problems is part of a beginner's introduction to geometry, specifically dealing with circles.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Circles - Rule to Find Radius from Diameter
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What is known about radius PZ given diameter BPZ
Circles - Rule to Find Radius from Diameter Worksheet
| Math worksheet on 'Circles - Rule to Find Radius from Diameter (Level 1)'. Part of a broader unit on 'Geometry - Intermediate - Intro' Learn online: app.mobius.academy/math/units/geometry_intermediate_intro/ |
| What is known about radius PN given diameter RPN |
| Nothing, PN and RPN are not related |
| PN and RPN add to 90 |
| PN is the same as RPN |
| PN is twice RPN |
| PN is half of RPN |
| PN and RPN add to 180 |
| What is known about radius CP given diameter BCP |
| CP is half of BCP |
| CP is twice BCP |
| CP is the same as BCP |
| CP and BCP add to 90 |
| Nothing, CP and BCP are not related |
| CP and BCP add to 360 |
| What is known about radius CX given diameter ZCX |
| CX and ZCX add to 360 |
| CX and ZCX add to 90 |
| Nothing, CX and ZCX are not related |
| CX is the same as ZCX |
| CX and ZCX add to 180 |
| CX is half of ZCX |
| What is known about radius CB given diameter RCB |
| CB and RCB add to 180 |
| CB is half of RCB |
| CB and RCB add to 90 |
| CB and RCB add to 360 |
| Nothing, CB and RCB are not related |
| CB is the same as RCB |
| What is known about radius MN given diameter RMN |
| MN and RMN add to 360 |
| MN and RMN add to 180 |
| MN is half of RMN |
| MN and RMN add to 90 |
| MN is the same as RMN |
| Nothing, MN and RMN are not related |
| What is known about radius PZ given diameter BPZ |
| PZ and BPZ add to 180 |
| PZ is half of BPZ |
| Nothing, PZ and BPZ are not related |
| PZ is the same as BPZ |
| PZ and BPZ add to 90 |
| PZ and BPZ add to 360 |
| What is known about radius RP given diameter XRP |
| RP is half of XRP |
| RP is twice XRP |
| Nothing, RP and XRP are not related |
| RP and XRP add to 90 |
| RP and XRP add to 360 |
| RP and XRP add to 180 |