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# Equations and Turn

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## Mr Mattock

on 11 January 2018

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#### Transcript of Equations and Turn

Equations and Turn
Starter
Write down the relationship between the angles shown in these pictures.
Equations and turn
Example
L.O. - Form equations using angle properties.
Starter
Write down the relationship between the angles shown in these pictures.
Angles are equal
o
o
o
x + 20
3x + 20
3x - 20
x + 20
Find the values of the angles in these diagrams.
Example
x + 20
3x + 20
3x - 20
x + 20
Find the values of the angles in these diagrams.
Find the value of y in this triangle.
Equations and turn
Find the value of y in this triangle.
3x - 2 = x + 38
3x = x + 40
2x = 40
x = 20
3x - 2 = 58
x + 38 = 58
180 - 58 - 58 = 64 = y
o
3x + 20 + x + 20 = 180
4x + 40 = 180
4x = 140
x = 35
3x + 20 = 125,
x + 20 = 55
3x - 20 = x + 20
3x = x + 40
2x = 40
x = 20
3x - 20 = 40,
x + 20 = 40
Activity
Complete the forming equation sheet
Activity
Complete the forming equation sheet
(i) x = 40
(ii) x = 90
(iii) x = 30
(iv) x = 30
(v) x = 18
(vi) x = 30
(vii) x = 20
(viii) x = 30
(ix) x = 75
(x) x = 20
(xi) x = 32.5
(xii) x = 25
Plenary
Plenary
a = 32
2a - 6 = 58
n = 30
n+50=80
2n+25=85
3n+20=110
4n-35=85
a=13
4a+44=96
5a-23=42
2a+16=42
n=25
4n+10=110
2n+20=70
5n-15=110
3n-5=70
Activities
Activity