С 10 до 21.00 по МСК ежедневно
Let's repeat the definitions that you already know and which we are going to use in our lesson.
Acute angle is an angle that more than 0° and less than 90°.
Right triangle is a triangle where one of its interior angles is a right angle, i.e. 90° angle.
Pythagorean theorem. In a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.
The interior angles of a triangle always add up to 180°.
Now choose the correspondence between images and definitions, which we have just repeated.
Before we begin the main part of the lesson, I’ll list the definitions, with which we are going to meet today:
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