Vertical angles. These are two angles who, together, form two pairs of opposite rays. This means that these two angles form two lines that intersect. These angles have to be equal.
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Four (4) angles is inside a rhombus. Two of them is equal, and the other two is equal too, as well. All four is always add up to 360 degrees.
Equilateral TriangleThree equal sidesThree equal angles, always 60°Isosceles TriangleTwo equal sidesTwo equal anglesScalene TriangleNo equal sidesNo equal anglesThere are three special names given to triangles that tell how many sides (or angles) are equal.There can be 3, 2 or no equal sides/angles:
In a parallelogram, opposite angles are equal. Since two angles measure 40 degrees each, the opposite angles are also 40 degrees. Therefore, the measures of the other two angles in the parallelogram are also 40 degrees each.
The Interior angles of a triangle add up to 180° The Exterior angles of a triangle (or any other polygon) add up to 360°.
You don't tell us enough information. In a square, there are four sides and four angles. The sides are all equal and the angles are all right angles. In a rectangle, there are four sides and four angles The opposite sides are equal and the angles are all right angles. There is no other shape in which all angles are right angles.