About This Set
Each of these 25 questions needs one formula: a triangle from its base and height or from three sides, a square from its diagonal, a path round a field, the number of tiles, a circle, a ring, a sector, and a few wheels and changes in area. Write the unit next to every number and draw a rough figure even when none is given. Most wrong answers in mensuration are caused by using a diameter as a radius or a perimeter as an area, not by the arithmetic. Allow about 25 minutes and finish the set before checking. If fewer than 20 are right, redo the topic section for each one you missed before you start Practice Set 2.