☰ Contents · Geometry

Practical applications and Chapter II review

Lessons 34–35 · 2 lessons · B. Xaydarov, E. Sariqov, A. Qo‘chqorov. Geometry, Grade 9 (textbook for general secondary schools), revised 4th edition. Huquq va Jamiyat Publishing, Tashkent, 2019
Answers are for parents and teachers.
1
Compute sin120° · cos60°.
2
In a triangle with sides 3, 3, 3√3, how large is the largest angle (degrees)?
3
a = 5, b = 5, γ = 90°. What is c²?
4
a(−2; 3), b(3; 2). What is a·b?
5
Why does the Pythagorean theorem follow from the law of cosines?