About This Set
These 25 questions each test one basic result, from angles on parallel lines and polygon angles to the congruence rules, the centroid, the proportionality theorem, chords and tangents. They come in mixed order, so first decide which result a question needs. Draw a rough figure for every question, even when none is given: in geometry a wrong picture causes more mistakes than wrong arithmetic. Allow about 25 minutes and answer all of them before reading the explanations. With fewer than 20 right, revisit the topic section behind each miss before moving on to Practice Set 2.