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Thank you!! )
Q5 all correct.
No. It is the height of the prism.
Well done for all correct !!
So now I have to get the area of the base and multiply it by the height of the prism to get the volume right?
ok So number #5-
Then multiply by 8
I got a decimal answer for this, so I had to check what 18 x sqrt(15) comes to.
I have an isosceles triangle with a height of 4 and a base of 6:
11- C (this was correct)
11. What is the area?
This triangle just became the base of a regular prism, with a height of 8:
12. What is the lateral area?
You need to work out the sides. The base is 6 but what about the two equal sides.
If you split the isosceles triangle down the middle to make a right angle. Half the base is 3 and the height is 4.
Then perimeter is this answer twice plus the base. Then multiply by 8. I can see the answer in the list.
13. What is the area of the largest rectangular side?
And you can get the largest by taking the longest side and multiplying by 8.
I can see this answer in the list.