Geo_Book_Answers

Answers to Exercises
9.
Sample description: Draw a segment and draw an
angle at one end of the segment. Mark off a
distance equal to that segment on the other side of
the angle. Draw an angle at that point and mark off
the same distance. Connect that point to the other
end of the original segment.
10.
Sample description: Draw an angle and mark off
equal lengths on the two sides. Use that length to
determine another point that distance from the
points on the sides. Connect that point with the
two points on the side of the angle.
11. Answers will vary. The angle bisector lies
between the median and the altitude. The order of
the points is either M, R, S or S, R, M. One possible
conjecture: In a scalene obtuse triangle the angle
bisector is always between the median and the
altitude.
mABC = 111
B
R Median
A S M
Altitude Angle
bisector
42 ANSWERS TO EXERCISES
C
12. new coordinates: E(4, 6), A(7, 0), T(1, 2)
13.
–5
14. half a cylinder
15. 503
16.
R
–5
–5
y
T'
T
E
E'
110
E
3.2 cm
110 110
A 5.5 cm C
A'
A
Reflectional Rotational
Figure symmetries symmetries
Trapezoid 0 0
Kite 1 0
Parallelogram 0 2
Rhombus 2 2
Rectangle 2 2
x