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Equations and Measures

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by

Mr Mattock

on 20 February 2017

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Transcript of Equations and Measures

Equations and Measures
Starter
Solve these equations:

(a) 3x = 12
(b) 3x + 4 = 16
(c) 4x + 4 = 16
(d) 2x + 4 = 16
(e) -2x + 4 = 16
(f) - x + 4 = 16
Example
The perimeter of this rectangle is 16 cm. Find the dimensions of the rectangle.
L.O. - Form equations from different measures, and then solve the equations.
1
2
Starter
Solve these equations:

(a) 3x = 12
x = 4
(b) 3x + 4 = 16
x = 4
(c) 4x + 4 = 16
x = 3
(d) 2x + 4 = 16
x = 6
(e) -2x + 4 = 16
x = -6
(f) - x + 4 = 16
x = - 24
1
2
x
x + 2
Example
The perimeter of this rectangle is 16 cm. Find the dimensions of the rectangle.
x
x + 2
x + x + 2 + x + x + 2 = 16
4x + 4 = 16
4x = 12
x = 3
x + 2 = 5
Example
The perimeter of this shape is 40 cm. Work out the value of x.
Activity
Complete the equations and measures worksheet
Plenary
Activities
Key
Examples

Activity
Answers

Worked
Example

Worked
Example

3x
8 cm
Example
The perimeter of this shape is 40 cm. Work out the value of x.
3x
8 cm
6x + 16 = 40
6x = 24
x = 4
Full transcript