KS3/iGCSE - Area of Compound Shapes

KS3/iGCSE - Area of Compound Shapes

Prior Knowledge recap on area of 2D shapes

Multiple Select

Which one below is the area of a rectangle

• $base\times height$

• $\frac{1}{2}\times base\times height$

Multiple Select

Which one below is the area of a triangle

•  $\frac{base\ \times height}{2}$ 

• $\frac{1}{2}\times base\times height$

Multiple Select

Which one below is the area of a trapezium

•  $\frac{base\ \times height}{2}$ 

•  $\frac{1}{2}\left(a+b\right)h$ 

Progress Check..

What is the answer to:

Multiple Select

Choose your answer below:

• $26cm$

• $26cm^2$

• $25cm^2$

What is the answer to:

Multiple Select

Choose your answer below:

• $26cm$

•  $70cm^2$ 

•  $66.5cm^2$ 

THINK, PAIR, SHARE

Find the area of the shaded region

Multiple Select

What is the area of the shaded region

• $96cm^2$

• $80cm^2$

• $80cm$