1 . Angle. The portion of the plane between two rays that have the same origin.
The angle of the top picture has two sides: BC and BA.
The origin of the two rays is the vertex B.
This angle ABC is read, naming the top in the middle.
2. The angle.
In the figure of the left are two angles: ABC and CBD, the sum of the two is ABD. The two angles are acute.
In the right figure we see two lines CD and EF intersect at point O. In this case the two lines are perpendicular and form four right angles and the DOE.
The acute angle is less than the right.
Answer these questions:
| angle EOD is ... | |
| angle ABC is ... | |
| angle CBD is ... | |
| angle COE is ... | |
| COF angle is ... | |
| angle ABD is ... | |
| FOD angle is ... | |
3. Classes angles.
The angle less than the rectum is called acute such as A, the right angle consists of two perpendicular lines and measures 90 degrees, as B, the obtuse is greater than the right, as the C.
The two right angle it is called plain angle, such as D, which is worth more than two right angles is called concave , as the E and the four right angle it is a Full angle, such as F.
Answer:
| The angle B is ... | |
| The angle A is ... | |
| The angle C is ... | |
| The angle F is ... | |
| The angle D is ... | |
| The angle E is ... |
|
Noting the drawing, answers to these exercises:
| Angle 1 is ... | |
| The angle 5 is ... | |
| The angle 2 is ... | |
| The angle 3 is ... | |
| The angle 4 is ... | |
| The angle 6 is ... | |
4 . Consecutive and adjacent angles.
two consecutive angles are those that have the same vertex and a common side between them.
Example: The angles AOB and BOC with consecutive common side is OB.
Two angles are adjacent when the sides are straight and are uncommon in the same line.
Example: PER POS angles are adjacent
Answers to these exercises:
| Angles 1 and 2 are ... | |
| angles 3 and 4 are ... | |
1. The right angle is 90 º (degrees), the flat has two straight or full 180 º and has four straight 360. Therefore the degree is 1 / 90 of angle or 1 / 180 of straight angle or 1 / 360 of full angle.
| The straight angle is ... | |
| The right angle is ... | |
| full angle is ... |
|
2. Protractor.
is an instrument used to measure angles. Is usually clear plastic with a fixed point 0 in the center of the base and an arc of 180 º. Used to measure a given angle and draw an angle of a specified number of degrees. It matches the vertex of the angle at point 0 of the carrier.
Example: Drawing XOY angle is 42 degrees.
Answer:
| angle of 42 degrees is ... | |
| than 140 º angle is ... | |
| The angle of 90 degrees is ... | |
| angle of 89 degrees is ... | |
| angle of 91 degrees is ... |
|
3. Complementary angles.
Two angles are called complementary when they add a right angle or 90 º. Angle 1 and 2 are complementary because they add a straight.
Answer:
| angle 1 is ... | |
| The angle 2 is ... | |
| The sum 1 + 2 is ... |
|
4. Supplementary angles.
Supplementary angles are two angles that add up to a straight angle or 180 º. In the drawing we see that the sum of angles 3 and 4 are a straight angle of 180 degrees.
Answers to these exercises:
| The angle 3 is ... | |
| The angle 4 is ... | |
| The sum 3 + 4 is ... |
|
5. Vertex angles.
are those who have the same vertex and its sides are rays opposite. In the picture are opposite angles also by c and d.
The vertex angles are equal, ie a = c and b = d. We also note that a and b are supplementary and are worth 180 º. They are also cool c b. As the common sum is b, we have a = c. Answer
seeing the picture above:
| The angles a and b are ... | |
| angles c are ... | |
| angles d are ... | |
| angles b and c are ... | |
| byd angles are ... | |
| bya angles are ... | |
0 comments:
Post a Comment