Mathematicians have resolved the first one trillion cases of an ancient mathematics problem. The advance was made possible by a clever new computational technique for multiplying large numbers. The ...

Prove two triangles are congruent by showing they satisfy one of four criteria. Find missing lengths by using the scale factor. The relationship between similar shapes may be expressed as a ratio.

The axes are not essential to this question as it is clear from the coordinates that the positive quadrant is the one being used. Use the coordinates of point A and point C to work out the height of ...