Finding right angles

Finding right angles

Pencil and paperOnline interactive
Overview
Using this Resource
Connecting to the Curriculum
Marking Student Responses
This task is about angle properties.
Name all the right angle(s) in each of the following diagrams.
The centre of each circle is labelled O.

Question 1Change answer

a) 
diagram of a circle and lines
Right angle(s):   

Question 1Change answer

b) 
diagram of a circle and lines
Right angle(s):   

Question 1Change answer

c)
diagram of a circle and lines
Right angle(s): 
Task administration: 
This task can be completed with pen and paper or online (with NO auto marking).
Level:
5
Curriculum info: 
Maths, Geometry and Measurement, Shape
Keywords: 
angles, right angles, circles, tangents
Description of task: 
Students are required to identify right angles in a series of diagrams, using their knowledge of angle properties relating to circles and tangents.
Learning Progression Frameworks
This resource can provide evidence of learning associated with
Geometric thinking, set 6
within the Mathematics Learning Progressions Frameworks.
Read more about the Learning Progressions Frameworks.
Answers/responses: 

 

Y11 (10/2001)

a)

XYZ or ZYX or Y

very easy

b)

NMO or OMN
LMO or OML
NOTE: If angles are denoted as 'M' only, give 1 mark.

all correct – moderate

1 correct – very easy

c)

PQR or RQP or Q
PSR or RSP or S

all correct – easy

1 correct – very easy

NOTE: Accept other notations for angles, also accept if no notation for angle is recorded.