A parallelogram with at least one right angle
a right angle is a right angle
The simple answer is no, not all parallelograms have at least one right angle. However, there are some that do. Rectangles and squares are 'special' parallelograms that all have at least one right angle.
an angle with a acute and right angle
One pair of perpendicular lines would create one right angle. Some kites have one right angle.
No it is impossible for a right triangle to have an obtuse angle therefore it will have one right angle and two acute angles.
One pair of perpendicular lines would create one right angle. Some kites have one right angle.
No. Some do, but some don't.
Some do, some don't.
A right angle triangle.
A right angle triangle.
right-angle triangle has at least one right angle .