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WeAre LearningTo
WeAre LearningTo
• To use angles to measure bearings
• To calculate back bearings
Calculate bearings and back bearingsGrade D
Success Criteria
WhatI’m LookingFor
Success Criteria
COULD
SHOULD
MUSTMUST be able to measure angles
SHOULD understand the rules of bearings
COULD understand how to calculate back bearings
WhatI’m LookingFor
SELF MANAGERS –
how can you keep your focus?
what information do you know already?
how are you trying to achieve your goal?
CREATIVE THINKERS –
everything is possible
Success Criteria
WhatI’m LookingFor
Success Criteria
COULD
SHOULD
MUSTMUST be able to measure angles
SHOULD understand the rules of bearings
COULD understand how to calculate back bearings
WhatI’m LookingFor
SELF MANAGERS –
how can you keep your focus?
what information do you know already?
how are you trying to achieve your goal?
CREATIVE THINKERS –
everything is possible
Bearings
Bearings are a measure of direction taken from North.
If you were travelling North you would be travelling on a bearing of 000°.
If you were travelling from the point P in the direction shown by the arrow then you would be travelling on a bearing of 000°.
If you were travelling from the point P in the direction shown by the arrow then you would be travelling on a bearing of 075°.
N
75°
P
Bearings are always measured clockwise from North and are written as three figures.
Compass points
N
EW
S
NE
SESW
NW
000°
045°
090°
135°
180°
225°
270°
315°
Measuring bearings
19/04/23 Grade DWALT
WILF
MUST be able to measure angles
SHOULD understand the rules of bearings
COULD understand how to calculate back bearings
Calculate bearings and back bearingsGrade D Bearings
Essential Maths GCSE
Exercise M18.2 p529 Questions 1, 3 Extension: Accurately draw and
measure Q 4 and 5
Back bearings
The bearing from point A to point B is 105º.What is the bearing from point B to point A?
A
N
105º
B
N
?
The angle from B to A is
105º + 180º = 285º
This is called a back bearing.105º
180°
Investigating back bearings
What have we been doing?
Any hints and tips to offer?
adjacent (side)angle: acute, obtuse, right, reflexbasebase angles,bearing,compass, degree (°)horizonal, point