write down the measure
of of i) some
oblose angles, , (ii) Some
sreflex angles :
Answers
Answer:
Types of angles
1. Right angle: An angle whose measure is 90° called a right angle
2. Straight angle: an angle whose measure is 180° is called a straight angle.
A straight angle has two right angles.
3. Reflex angle:
An angle whose measure is greater than 180° and less than 360° is called reflex angle.
4. Complete angle:
An angle whose measure is 360° called a complete angle.
5. Acute angle:
An Angle whose measure is less than 90° is called an acute angle.
6. Obtuse angle:
An angle whose measure is greater than 90° and less than 180° is called an obtuse angle.
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Measure of Some acute angles are: 30 ° , 45° , 70°, 85°
Measure of Some obtuse angles are : 105° , 120°, 175°, 95°
Examples of acute angles:
1. Sliding ramp for children
2. Ladder placed against the wall.
3. Some one observing the tree.
Examples of obtuse angles:
1. Bend roof top
2. Angle between the screen & the base of the laptop.
[ figure is in the attachment]
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