FAHS – FEILDING HIGH SCHOOL
YEAR 9 GEOMETRY 1
ANGLES PRETEST
Equipment permitted: Pens, pencils, eraser and ruler ONLY
Time Allowed: 25 minutes
1.
a)
b)
c)
2.
Length is measured in metres. Time is measured in minutes. What units do we
measure angles in?
How many of these units are in a full turn?
How many of these units are in a right angle?
What type of angle is each of the following?
a)
3.
b)
c)
d)
a)
b)
What is the name of the piece of equipment used to measure angles?
Sarah has been asked to measure the angle below. She has been given all the
equipment she needs, but she does not know what to do. Write clear instructions
explaining how Sarah can measure the angle.
c)
Sarah's friends estimate the size of the angle before Sarah measures it. Their
estimates are below. Who was closest to the actual size of the angle?
Jane: 250°
Anna: 165°
Tim: 80°
Ryan: 100°
Explain how you worked out your answer to part (c).
d)
4.
a)
b)
c)
Draw an angle that is between 45° and 90°.
Draw a reflex angle named ALK.
Draw an angle that is bigger than a right angle but smaller than 180°. Label this
angle RST.
5.
Find the size of each marked angle. Give a geometric reason for each answer.
a)
b)
b
85°
40°
a
35°
c)
d)
c
20°
140°
°
d