A rectangle. Obviously the right angles are in the four corners of the rectangle. The lines of symmetry occur across the horizontal and vertical. There are no lines of symmetry on the diagonal.
octagon
It is a trapezoid and its other 2 angles are obtuse and acute
The shape you are describing is a trapezoid. A trapezoid is a quadrilateral with at least one pair of parallel sides. It can have two right angles, but it does not have any lines of symmetry due to its asymmetrical nature.
an equilateral triangle
no shape does! * * * * * Not true. A parallelogram has rotational symmetry of order 2, but no lines of symmetry.
a pentagon
A rectangle.
A pentagon has 5 lines of symmetry and no right angle.
octagon
If your asking what shape has three lines of symmetry, your answer would be an equilateral triangle. You can tell how many lines of symmetry a shape that has all angles of the same measure has by looking at it's angles. Ex., pentagon has five angles--five lines of symmetry; octagon has eight angles, eight lines of symmetry; etc.
An irregular quadrilateral.
A shape that has no lines of symmetry, two right angles, and one acute angle is a right-angled triangle that is not isosceles. This triangle can have its right angles positioned in such a way that the overall shape lacks any symmetry. The acute angle ensures that the triangle does not conform to typical symmetrical properties. Thus, the right-angled triangle fits the criteria specified in your question.
rhombus
A rectangle.
a square
Parrallelogram (it has rotational symmetry but no lines of symmetry)
square and rectangles are technicality squares