- Line joins two positions and which are nonstop in two directions. Lines have one endpoint of two lines and infinite in one direction is called angle.
- The grouping point of two lines is called the vertex.
- Angles are denoted as degrees. In measurement of angles can diverge in between 0 and 180 angles.
Concept -measurement Angle:
Concept of angles:
There are three major categories of angles: right angle, obtuse angle, and acute angle.
- A right angle – a measurement of an angle is 90 degrees.
- An acute angle - a measurement of an angle in between 0 to 90 degrees.
- An obtuse angle - a measurement of an angle in between 90 and 180 degrees.
More about angles and measurement of angle:
More about angles:
1) Vertical angle measurements
are two angles with a common vertex and with sides that are two pairs
of opposite of opposite rays. (That is, the union of the two pairs of
sides is two lines.)
2) A right angle measurements has a measure of 90o.
3) An acute angle measurement is an angle whose measure is larger than 0o and smaller than 90o.
4) An obtuse angle measurement has a measure larger than 90o and less than 180o.
5) Straight angle measurement has a measure of 180o. The rays of a straight angle lie on a line.
6) Complementary angle measurements are two angles, the addition of whose measures is 90o.
7) Supplementary angle measurements are two angles, the addition of whose measures is 180o.
Step to measurement of angle:
Step 1: To find the angle is obtuse or acute before using the protractor.
Step 2: Position the protractor on the center mark on the vertex of the angle
Step 3: position the protractor, line up with one ray of the angle and another ray of the angle cross the protractor’s scale
Step 4: to check the measure of the angle of the line that crosses the protractor scale.
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