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Measuring angles, adjacent (смежные) and vertical (вертикальные) angles.

Properties and the Pythagorean theorem (introduced in some curricula). Example: Solving a Typical 7th-Grade Problem A common early problem involves finding adjacent angles. Problem: Find two adjacent angles if one is 40∘40 raised to the composed with power larger than the other. Define the variables Let the smaller angle be . Then the larger angle is gdz po utjvtnhbb 7 klass

Signs of congruence (равенство) of triangles, isosceles triangles, and the sum of angles. and the sum of angles.