Algebraic Area Problems The area of this shape

Algebraic Area Problems The area of this shape is 74 cm 2. What is its perimeter? How can you find the area of an L-shape?

Algebraic Area Problems

Algebraic Area Problems The area of this shape is 74 cm 2. What is its perimeter? Ellie attempted to find an expression for the area by splitting the area in this way.

Ellie’s Expression B A Ellie has made a mistake in her working out. In your pairs, go through her working line by line to find her error. Can you correct it?

Ellie’s Expression

Algebraic Area Problems The area of this shape is 74 cm 2. What is its perimeter? In your pairs, find an expression for the area of the L-shape by splitting this way. B Finished? A Do you get the same expression if you split the shape in a different way? And another way?

Algebraic Area Problems The area of this shape is 74 cm 2. What is its perimeter? B A

Algebraic Area Problems The area of this shape is 74 cm 2. What is its perimeter? On your whiteboards: Using the information in the question, turn your expression into an equation.

Algebraic Area Problems • What is the perimeter of the shape?

Algebraic Area Problems In your pairs, split the shape in two different ways to solve the problem. Do you get the same answer? The area of this shape is 22 cm 2. What is its perimeter?

Algebraic Area Problems Now try this… The surface area of this cuboid is 3600 cm 2. What is its volume?