No.
A right angled triangle, A square, rectangle, a right trapezium, Selected versions of irregular polygons with 5 or more sides.
Non!!! All four angles in a rectangle are 90 degrees. Similarly a square However, for quadrilaterals trapezium/rhombus/kite/parallelogram may have 2 acute angles
It could be a kite or a right trapezium.
90 degrees
No, if a trapezium had three right angles, it would mean the fourth angle would have to be 90 degrees. That would make it a square or a rectangle.
No because if it did then it would be a rectangle but it does have 4 interior angles that add up to 360 degrees
Trapezium See attached link.
It is not a requirement that any of the angles are right angles (90 degrees), to qualify as a parallelogram.
Acute angles are angles that are less than 90 degrees. Obtuse angles are angles that are more then 90 degrees and less then 180 degrees Any angle that is 90 degrees is a right angle. == == == ==
They are complementary angles that add up to 90 degrees
They are said to be complementary angles that add up to 90 degrees
Two angles that have a sum of 90 degrees are called complementary angles.
Two angles that add to 90 degrees are called complementary.
No.
No, a trapezoid cannot have four obtuse angles. Since it is a quadrilateral, the sum of the angles must equal 360 degrees. To be considered obtuse, an angle must be greater than 90 degrees. If all four exceeded 90 degrees, the total would exceed 360.
A convex angle is any angle of 180 degrees or less. So all angles less than 90 degrees are certainly convex angles, but so are the angles between 90 and 180 degrees.