+0  
 
0
106
5
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https://vle.mathswatch.co.uk/images/questions/question17882.png

 

https://vle.mathswatch.co.uk/images/questions/question15313.png

 

for the second one i did 7x4=21

40-21=19

now confused

 Apr 22, 2020
 #1
avatar+252 
0

1. 88 

2. 55%

 Apr 22, 2020
edited by MooMooooMooM  Apr 22, 2020
 #2
avatar+23524 
+1

 

Side of square = side of rectangle = 6 cm

      area of rectangle = 4/3 (36 ) = 48 cm^2      so length of rectangle = 8 cm

Perimeter =   8 (8cm) + 4 (6cm) = 88 cm

 Apr 22, 2020
 #3
avatar
0

how did you get 55%

Guest Apr 22, 2020
 #4
avatar+252 
0

You find the area of the two triangles then you subtract that from the whole since the area is 100 and that is yer percentage

MooMooooMooM  Apr 22, 2020
 #5
avatar+23524 
+2

Side of the square is 10 cm   area = 10 x 10 = 100 cm2

Upper left triangle area = 1/2 bh = 1/2  3 x 10 = 15 cm^2

Lower right triangle area = 1/2 6 x 10 = 30 cm^2

Total UNshaded area = 45 cm^2

Then shaded area = 100 -45 = 55 cm^2    out of 100 cm^2    =   55 %

 Apr 22, 2020

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