☰ Contents · Geometry

Constructing perpendiculars and triangles

Lessons 51–52 · 2 lessons · Geometry Grade 7, corrected and expanded 3rd edition. Yangiyo‘l Poligraf Servis, Tashkent, 2017 (approved by the Ministry of Public Education)
Answers are for parents and teachers.
1
C is the midpoint of AB = 18 cm. CB (cm)?
2
Can a triangle with sides 7, 7, 15 cm be built? Why?
3
A side of 6 cm with adjacent angles 55° and 65°. The third angle (degrees)?
4
In your notebook construct a triangle with sides 5, 6, 7 cm with compass and straightedge (with an adult).
5
Write the justification of the perpendicular construction in one sentence.