Chapter I review
Answers are for parents and teachers.
1
A, B, C, D in order on a line, AB = 1.5 m, BC = 2 m, CD = 90 cm. Find AD (cm).
440
2
8 points, no three collinear: how many lines pass through pairs of them?
28
3
Segment AB = 24 cm. AC is 6 cm longer than CB (C on AB). AC in cm?
15
4
A circle’s radius is 9 cm shorter than its diameter. Find the diameter (cm).
18
5
Write three axioms of Chapter I in your own words.
For example: one line through two points; a line divides the plane in two; on a ray one segment equal to a given one can be laid off.