Construct it
The constructions this book asks for, with a ruler, a compass and a sharp pencil. Pick a set of values, construct it on paper one step at a time, and check each step against the drawing. Every drawing is at true size.
- Angles with a compass 60°, 120° and 90°, and 30° and 45° by bisecting Unit 11 · Construction
- More angles with a compass 15°, 75°, 105°, 135° and 150°, each by bisecting Unit 11 · Construction
- Bisecting an angle Cut any angle into two equal halves Unit 11 · Construction
- Bisecting a line segment Its midpoint, and the perpendicular through it Unit 11 · Construction
- A parallel line through a point Copy the angle: equal alternate angles Unit 11 · Construction
- A triangle from its measures Three sides, two sides and the angle between, or a side and two angles Unit 11 · Construction
- A right-angled triangle (RHS) From the right angle, the hypotenuse and a side Unit 11 · Construction
- A parallelogram equal to a parallelogram The same base, between the same parallels Unit 11 · Construction
- A triangle equal to a triangle The same base, its top on a parallel line Unit 11 · Construction
- A parallelogram equal to a triangle Half the base, between the same parallels Unit 11 · Construction
- A triangle equal to a parallelogram Twice the base, between the same parallels Unit 11 · Construction
- A triangle equal to a quadrilateral A parallel to a diagonal removes a corner Unit 11 · Construction
- Tangents from a point to a circle Both tangents, by the circle on OP Unit 12 · Circle