Help NferD Question D

scooby1 · Post by **scooby1** » Sat Sep 05, 2009 3:23 pm

The area of the shaded triangle is 250mm squared. what is the area of the large triangle? The large triangle is made up of four small traiangles.

Therfore 250mm squared times 4. The answer is 10cmsquared. How do you work it out?

WP · Post by WP » Sat Sep 05, 2009 3:36 pm

The "squared" relates to the units, not the whole thing. So that's 250 square millimetres, times 4 = 1000 square millimetres. There are 10 millimetres in a centimetre, so 100 square millimetres in a square centimetre.

scooby1 · Post by **scooby1** » Sat Sep 05, 2009 11:33 pm

Thanks WP

I will explain to DS tomorrow.