Mar 17, 2022 Mar 17, 2022 Created by Mr.Lafferty Math Dept Created by Mr.Lafferty Math Dept Revising Basic Angles Naming Angles www.mathsrevision.com Finding Missing angles Angles in a Triangle Corresponding Angles Alternate Angles Angles Angles ational 4 REL 1.2c Angles in a Quadrilateral Drawing Triangles Measuring Angles
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4-Aug-15Created by Mr.Lafferty Math Dept Revising Basic Angles Naming Angles Finding Missing angles Angles in a Triangle Corresponding.
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Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Revising Basic Angles
Naming Angles
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Finding Missing angles
Angles in a Triangle
Corresponding Angles
Alternate Angles
AnglesAnglesNational 4 REL 1.2c
Angles in a Quadrilateral
Drawing Triangles
Measuring Angles
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Starter QuestionsStarter Questions
Q3. Calculate 2.34 + 4.7 + 0.12
Q1. Convert to the 24 hour clock. (a) 7:25 pm (b) 6:50 am
Q2. Write down the type of angle that is less than 90 deg.
Q4. Round the following to nearest 1000.
(a) 12,501 (b) 369,765
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National 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
1.1. To be able to identify acute, To be able to identify acute, right-angle, obtuse, straight right-angle, obtuse, straight line and reflex angles.line and reflex angles.
1. To revise Type of Angles.
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Type of AnglesType of AnglesNational 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Acute less than 90o
Obtuse Between 90o – 180o
Right Angle exactly 90o
reflex over 180o less than 360o
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Straight Line Angle exactly 180o
Type of AnglesType of Angles
HorizontalV
ertica
l
National 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Now try Ch2 (page 14)
Exercise 1
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Type of AnglesType of AnglesNational 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Starter QuestionsStarter Questionsw
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Q3. Calculate 5.65 – 1.3
Q1. Convert to the 12 hour clock. (a) 17:15 (b) 05:40
Q2. Write down 2 numbers that add to give 8 andmultiply to give 15.
Q4. Round the following to nearest 100.
(a) 13,551 (b) 369,449
National 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
1.1. To be able to name an To be able to name an angle.angle.
1. To explain how we name angles by THREE capital letters with the angle sign. The middle letter being where the angle is.
2.2. Understand the Understand the difference between the difference between the type of angle and the type of angle and the name of an angle.name of an angle.
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Naming AnglesNaming AnglesNational 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Naming AnglesNaming Anglesw
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A
B C
Type of angle is acute
Name of angle is ∠ ABC
Type of angle is obtuse
Name of angle is ∠ ZYX
X
YZ
MIDDLE LETTER IS ALWAYS WHERE THE ANGLE IS
ALWAYS 3 CAPITAL LETTERS
National 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Now try Ch2 (page 15)
Exercise 2
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Naming AnglesNaming AnglesNational 4 REL 1.2c
19 Apr 202319 Apr 2023 Created by Mr. Lafferty Created by Mr. Lafferty 1010
Starter QuestionsStarter Questions
Q3. List the prime numbers between 10 and 20.
Q1. Convert to the 12 hour clock. (a) 17:15 (b) 05:40
Q2. Write down lowest common multiple of 3, 4 , 5.
Q4. Round the following to nearest 100.
(a) 13,551 (b) 369,449
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A 180o Protractor
Outside scale from 0o to 180o going in a clockwise direction.
Inside scale from 0o to 180o going in an
anti-clockwise direction.
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You need to be able to measure an angle to the nearest degree. To help you do this you should always:1. Look directly down onto the cross point.
2. Always use the protractor in a horizontal manner as shown below.
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1
2
Measuring Angles with a
180o Protractor
0 on the outside so use outside
scale
0 on the inside so use inside scale
67o
50o
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3
4
Measuring Angles with a
180o Protractor
0 on the outside so use outside
scale
0 on the inside so use inside scale
135o
120o
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Now try Ch2 (page 17)
Exercise 3
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Naming AnglesNaming AnglesNational 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept
Starter Starter QuestionsQuestions
(a) - 6 - 7 (b) -10 + (-3) (c) - 2 - 12
Q2. Convert to 12 hrs clock
(a) 23 00 hrs (b) 14 23 hrs
Q.3 Solve 5x - 45=70
1. Calculate:
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National 4 REL 1.2c
Apr 19, 2023Apr 19, 2023 Created by Mr.Lafferty Math DeptCreated by Mr.Lafferty Math Dept