Asmall exhaust fan with diameter 10cm is to be fitted at the centre of a 12cm by 12cm square metal panel. accurately draw the diagonals to locate the centre of the square panel and the circle.

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.