What are facts or more relevant to geometrical angles?

Answer 1

1 Angles are measured in degrees, minutes and seconds

2 Angles are measured with a protractor

3 Angles can be constructed with a compass and a straight edge

4 Angles around a point add up to 360 degrees

5 Angles on a straight line add up to 180 degrees

6 Angles that are complementary add up to 90 degrees

7 Angles that are supplementary add up to 180 degrees

8 Angles that are corresponding are equal in size

9 Angles that are alternating are equal in size

10 Angles exterior to any polygon add up to 360 degrees

11 Angles within a polygon are the product of (number of sides-2)*180

12 Angles of depression and elevation help measure distances and heights

13 Angles that are acute are greater than 0 but less than 90 degrees

14 Angles that measure 90 degrees are right angles

15 Angles that are obtuse are greater than 90 but less than 180 degrees

16 Angles that are reflex are greater than 180 degrees

17 Angles are used in trigonometry which means triangle measurements

18 Angles can be the tangent ratio of right angle triangles

19 Angles can be the cosine ratio of righht angle triangles

20 Angles can be the sine ratio of right angle triangles

21 Angles can be measured by shadows caused by the Sun