800 the strategy I used was adding 32 over and over 25 times
Given:
The square box.
To find:
The fraction of colored part of the square.
Solution:
From the given box it is clear that,
Total number of small squares = 100
Number of colored squares = 0
So, the fraction of colored part of the square is
![\text{Fraction}=\dfrac{\text{Colored squares}}{\text{Total squares}}](https://tex.z-dn.net/?f=%5Ctext%7BFraction%7D%3D%5Cdfrac%7B%5Ctext%7BColored%20squares%7D%7D%7B%5Ctext%7BTotal%20squares%7D%7D)
![\text{Fraction}=\dfrac{0}{100}](https://tex.z-dn.net/?f=%5Ctext%7BFraction%7D%3D%5Cdfrac%7B0%7D%7B100%7D)
![\text{Fraction}=0](https://tex.z-dn.net/?f=%5Ctext%7BFraction%7D%3D0)
Therefore, the fraction of colored part of the square is
.
55a and 22b both are terms in that equation
The area formula for rectangles is lxw. To solve, I would divide the figure up into 3 rectangles- top,middle and bottom, then find the areas and add them together.
Top: 4x13=52 cm^2
Middle: 5x8=40 cm^2
Bottom: 21x10=210 cm^2
(5 is the width of the middle piece. You get it from subtracting. 21-8-8=5. 13 is the width of the top piece. 5+8=13)
52+40+210
=302 cm^2
So your answer is 302 square centimetres.