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https://vle.mathswatch.co.uk/images/questions/question9663.png

https://vle.mathswatch.co.uk/images/questions/question9665.png

 May 13, 2020
 #1
avatar+1458 
+2

Don't repost questions so fast.

 

For question one.

 

Use what you know to split the complex figure apart into rectangles.

 May 13, 2020
 #2
avatar+286 
+2

Just to give you some hints: 

for question 1, add 11*14 with (20-11)*9

for question two do the same thing with the splitting method. 

 May 13, 2020
 #3
avatar+111360 
+1

First  one  ...we  have  two rectangles

 

The top rectangle  has  the dimensions  (11)  x (14 - 9)   =  11 x 5   =  55 cm^2

 

The bottom rectangle  has the dimensions  20 x 9  =  180 cm^2

 

Total area  =  [55 + 180] cm^2   =   235 cm^2

 

 

cool cool cool

 May 13, 2020
 #4
avatar+111360 
+1

Second one

 

Using the same idea as in the first one

 

The top rectangle  has dimensions  10 x (27 - 9)  =  10 x 18   = 180 cm^2

 

The bottom rectangle  has dimensions  9 x 24  =  216 cm^2

 

Add these together to get the total area

 

 

cool cool cool

 May 13, 2020

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