acute
Complementary.
Yes, a quadrilateral ABCD can be a parallelogram if angle D plus angle B equals 180 degrees. In a parallelogram, opposite angles are equal, and consecutive angles are supplementary (their sum equals 180 degrees). Therefore, if angle D and angle B are supplementary, it is consistent with the properties of a parallelogram. Thus, the condition does not contradict the definition of a parallelogram.
Angle a plus angle b subtract from 180 equals angle c
9 degrees
50 Degrees
Complementary.
The angles are supplementary if they have a sum of 180 degrees.
I am pretty sure they would be considered supplimentry angles. m<1+m<2=180 : definition of supplimentry
Angle a plus angle b subtract from 180 equals angle c
120 Since the measures of the angles of supplementary angles add up to 180, 60 plus something else equals 180. 180-60=120
Acute
9 degrees
X = 180 - Y so 180 - Y = 2x + 4 and Y = 4x + 20 so 180 - 4x - 20 = 2x + 4 therefore 6x = 156 so x = 26 making Angle X = 56o and Angle Y = 124o
It is a trapezoid that can have two right angles plus one obtuse angle plus one acute angle and the four angles add up to 360 degrees.
36.64
50 Degrees
All triangles have 3 sides and 3 interior angles that add up to 180 degrees and they are classed as follows:- 1 Scalene triangle has 3 acute angles of different sizes 2 Right angle triangle has a 90 degree angle and 2 acute angles 3 Obtuse triangle has an obtuse angle and 2 acute angles 4 Isosceles triangle has 2 equal angles plus another angle 5 Equilateral triangle has 3 equal 60 degee angles