Question 9:
In diagram below, ADB is a right-angled triangle and DBFE is a square. C is the midpoint of DB and CH = CD.
Calculate the area, in cm2, of the coloured region.
Solution:
Area of △ ABC=12×6×8=24 cm2Area of trapezium BCHF=12×(12+6)×6=54 cm2Area of CDEFH=(12×12)−54=144−54=90 cm2Area of coloured region=24+90=114 cm2
In diagram below, ADB is a right-angled triangle and DBFE is a square. C is the midpoint of DB and CH = CD.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/01/Picture19.png)
Solution:
Area of △ ABC=12×6×8=24 cm2Area of trapezium BCHF=12×(12+6)×6=54 cm2Area of CDEFH=(12×12)−54=144−54=90 cm2Area of coloured region=24+90=114 cm2
Question 10:
Diagram below shows a rectangle ACDE.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/01/Picture18-1.png)
Calculate the area, in cm2, of the coloured region.
Solution:
Using Pythagoras'
Diagram below shows a rectangle ACDE.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/01/Picture18-1.png)
Calculate the area, in cm2, of the coloured region.
Solution:
Using Pythagoras'
Question 11:
Diagram below shows a sketch of parallelogram shaped garden, PQRS that consists of flower beds and a playground.
Calculate the area, in m2, of the flower beds.
Solution:
Diagram below shows a sketch of parallelogram shaped garden, PQRS that consists of flower beds and a playground.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2019/01/Picture41.png)
Solution: