Which shows 53^2-47^2 being evaluated using the difference of square method

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Segment an is an altitude of right δabc with a right angle at a. if ab = 2, squared 5 in and nc = 1 in, find bn, an, ac.

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.