by measuring it:)5
by looking to at it by looking to at it
A 45-45-90degree triangle is classified as an isosceles triangle.
When it has four sides equal in length and each of the four angles are 90 degrees.
A quadrilateral with no right angles can refer to most kites, most trapezoids, some parallelograms, and a few quadrilaterals that cannot be classified any more specifically.
All angles of an octagon must add up to 1080 degrees. A "regular" octagon has all equal angles, which are all 135 degrees. Other angles are possible though. As long as the shape has 8 sides and all angles add up to 1080, it is still classified as an octagon.
sides, and angles
A square is classified as a rectangle with four corner angles.
A square is classified as a quadrilateral because it has four sides and four angles. It is also classified as a regular polygon, as all four sides are equal in length and all four angles are right angles.
A trapezoid can have up to two right, 90 degree angles for it still to be classified as a trapezoid.
A triangle with no equal sides or angles will always be classified as 'scalene'.
Depends; if it's classified as "regular", then all angles of the polygon are congruent.
by looking to at it by looking to at it
A Quadrilateral or a rhombus. A it has fur sides and the angles add up to 360o.
It depends on how they are classified. They can have 1 to 4 acute angles, they can have 1 to 4 right angles, they can have 1 to 5 obtuse angles. The individual values of the angles will generate different pentagons. They can be regular or irregular. They can be convex or concave.
A 67 degree angle would be acute. Acute angles are smaller that 90 degrees. Right angles are 90 degrees. Obtuse angles are more that 90 degrees. Straight angles are 180 degrees.
A square must have 4 parallel sides of equal length and 4 right angles, a rhombus does not need to have any right angles (but can include one or more right angles).
A parallelogram can have 4 right angles, but instead of being classefied as a parallelogram, it will be more specifically classified as a rectangle, but all rectangles are parallelograms.