Two adjacent angles that share a common side are said to be contiguous. Two triangles next to each other would be an example of a contiguous angle, or a figure that resembles . The line in the middle is shared by both triangles.
The other two angles would be acute angles
A complementary angle is the angle that would create a right angle when added on to the original angle. So, if you had an angle of 60o, the complementary angle would be 30o
By a straight angle I assume you mean an 180° angle, so two angles that form a 180° angle would be called supplementary angles.
Two equal angles would be the result
No that would be impossible but it can have 2 acute angles and 1 right angle which would be a right angle triangle
When you bisect a straight angle, which measures 180 degrees, you divide it into two equal angles. Each of these angles would measure 90 degrees. Therefore, the two angles formed by bisecting a straight angle are both right angles.
You have two angles. Their sum is 45 degrees. If you had one more angle, then you would have three angles. Their sum would be more than 45 degrees.
The exterior angle of a triangle is equal to the sum of the two opposite interior angles. So if a triangle had points A, B and C: The exterior angle at B would equal the sum of interior angles at A and C. Similarly, the exterior angle at C would equal the sum of interior angles at A and B And the the exterior angle at A would equal the sum of interior angles at C and B.
Two obtuse angles.
A right angle has one angle, notice the words, "A right angle" (emphasis on the "A"), if it were a right triangle it would have 3 angles (TRIangle, tri means three).
there are 4 angles and normally, there would be 2 angles that are smaller than a right angle Except of cause if the parallelogram is a square or a rectangle, all angles are equal to 90 i.e. right angle
The sum of two acute angles is sometimes an obtuse angle because, acute angles can measure from 10 to 90 degrees. Two 30 degree angles would both be acute whose sum would only create another acute angle of 60 degrees. But, two80 degree angles would both be acute angle whose sum would only create an obtuse angle.