This problem is adapted from the NRICH task Graphical Triangle with permission […]
(1) Plot the graphs of the straight lines y = x, y = 1.1x – 0.2 and y = 0.9x – 0.1
What do the graphs tell you about the solutions to the two pairs of simultaneous equations y = x y = 1.1x – 0.2 and y = x y = 0.9x – 0.1 […]
Do you have exactly the right amount of information or more information than you need?
This problem is adapted from the NRICH task Matchless with permission of the University of Cambridge. All […]
A triangle has sides 12, 13 and 15 units. Circles are drawn with centres at the vertices of the triangle so that each circle touches the other two.
Find the radii of the circles.
Can you always find touching circles for any triangle?
What about other polygons?
Click here for the Notes […]