Write variable expressions from diagrams
Key notes:
Learn with an example
Write an expression that represents the length of the green line. Combine like terms.
The green line and the black line are the same length:
length of green line=length of black line
The black line is the sum of its segments, so:
length of black line=p + 10
Putting these together gives:
length of green line=length of black line
=p+10
The length of the green line is p + 10.
Write an expression that represents the length of the green line. Combine like terms.
The green line and the black line are the same length:
length of green line=length of black line
The black line is the sum of its segments, so:
length of black line=y + 21
Putting these together gives:
length of green line=length of black line
=y+21
The length of the green line is y+21.
Write an expression that represents the length of the green line. Combine like terms.
The green line and the black line are the same length:
length of green line=length of black line
The black line is the sum of its segments, so:
length of black line=d+d
=2d
Putting these together gives:
length of green line=length of black line
=2d
The length of the green line is 2d.
let’s practice!
