book Maths Puzzle Numerical Ability

Please do you have a simple formula for finding the centre of a 2 dimensinal circle if I know 3 points on this circle?

Read Solution (Total 0)

book Other Question

Hi. I need to find the area of the following:

A triangle with two 45 degree angles.

Can you explain this please? Thanks Can someone help me with this problem?

Help me write the following ratios in simplest form:

The ratio of 7 dimes to 3 quarters

Thanks!
Sher