Answer:
m(arc CD) = 112°
Step-by-step explanation:
Use the property of intersecting chords and angles between these chords,
m∠CED =
m∠CED + m∠AED = 180°
80° + m∠CED = 180°
m∠CED = 100°
Now substitute the measure of angle CED and arc AB in the expression,
100° =
200° = 88° + m(arc CD)
m(arc CD) = 112°
Answer:
-
Step-by-step explanation:
using the half angle formula
cos( ) = ±
cos195° = cos(180 + 15)° = - cos15°
then
cos15° = cos ( ) = = = =
then
cos195° = - cos15° = -
Answer:
1.-3, 2.1/3=3
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Answer:
Step-by-step explanation:
To copy an angle we follow the following steps,
1). Draw a working line with the help of a straightedge.
2). Now we put a point S as the vertex of the angle.
3). Construct an arc with a radius 'r' (any length ) from vertex S which intersects the working line say at V.
4). With the same radius we draw an arc from point E which intersects the line ED and EF at G and H respectively.
5). Mark an arc from point G which intersects line EF at I.
6). Measure the distance between points G and I with compass and mark an arc from point V which intersects the previous arc say at U.
7). Now join the points S and U.
Hence we copy any angle.
The answer for this question would be F) Additive identity or the sixth option.
The answer is additive identity because you're adding a number plus 0 and the result is the number u added.