Tell him very nicely and give him a small amount of advice about what to do, and don't press the issue against him. Remember that since you are his father/mother, so talking about such an issue could become awkward to him, and let him decide weather he wants to be 90 degrees or less
You know that at least one of them must be acute. A quadrilteral can have three obtuse angles, but not four.
An obtuse angle is DEFINED as an angle whose measure is greater than 90 degrees and less than 180 degrees.
No because an obtuse angle is greater than 90 degrees and a regular triangle is an equilateral triangle that has 3 equal 60 degree angles that add up to 180 degrees.
No because all 3 interior angles of a triangle add up to 180 degrees and if it had two obtuse angles then that would be over 180 degrees.
If x is acute, then x < 90 and -x > -90. Adding 180 to both sides, 180-x > 90, i.e. the supplement of x is obtuse.
its kinda like his last name but not its hard to explain
No because the 4 interior angles of any quadrilateral, which a trapezoid comes under, add up to 360 degrees and 4 obtuse angles would be greater than 360 degrees
Because the 3 angles in a right angle triangle add up to 180 degrees and if an obtuse angle was included then they would add up to over 189 degrees.
obtuse
There is no such thing as a "random" triangle. Therefore, there is nothing more to explain. To know more on the classifications of how the names of triangles are classified, please see the following question on this site: Is there such thing as an obtuse right triangle? Thank you.
An obtuse triangle has an obtuse angle.
obtuse triangle