The sum of the interior angles of any triangle is always 180°. To find a missing angle, subtract the sum of the known angles from 180°. For example, if two angles measure 90° and 35°, the missing angle is 180° - (90° + 35°) = 55°.
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TheTRICK you DIDN'T know about TRIANGLES!😏Ajouté :
If you fail this level, it's because you didn't understand level one.
Take a look at this. If you know that one of the angles measures 90° and another measures 35°, what is the measure of the remaining angle? Don't just guess. Pause the video and do it right.
You know that the sum of the measures of the interior angles of a triangle is 180°.
Solving the left side of the equation, we get So, the measure of the missing angle is 55°.
Easy. If you really understand the 180°, comment [music] 55° and follow us to level three.
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