Question 6:
Diagram below shows a right pyramid with a square base.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2016/01/Picture53-1-300x271.png)
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2016/01/Picture53-1-300x271.png)
Calculate the total surface area, in cm2, of the right pyramid.
Solution:
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2016/01/Picture54-1-300x260.png)
h2= 102 – 62
= 100 – 36
= 64
h = √64
= 8cm
Total surface area of the right pyramid
= (12 × 12) + 4 × (½× 12 × 8)
= 144 + 192
= 336 cm2
Question 7:
Diagram below shows a prism.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture122.png)
Draw to full scale, the net of the prism on the grid in the answer space. The grid has equal squares with sides of 1 unit.
Solution:
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture123.png)
Diagram below shows a prism.
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture122.png)
Draw to full scale, the net of the prism on the grid in the answer space. The grid has equal squares with sides of 1 unit.
Solution:
![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/12/Picture123.png)