| Number of degrees | Type of angle | Reason |
|---|---|---|
| 120 | Obtuse | > (greater than) 90 degrees |
| 170 | Obtuse | > (greater than) 90 degrees |
| 90 | Right angle | = 90 degrees |
| 270 | Reflex | >(greater than) 180 degrees |
How many degrees is around a circle?
A circle is divided into 360 equal degrees, so that a right angle is 90°. For the time being, we’ll only consider angles between 0° and 360°, but later, in the section on trigonometric functions, we’ll consider angles greater than 360° and negative angles.
What is a 120 degree triangle called?
isosceles triangle
An isosceles triangle has an angle that measures 120 degrees.
Is a 120 degree angle obtuse?
An obtuse angle is a type of angle whose degree measurement is more than 90° but less than 180°. Examples of obtuse angles are: 100°, 120°, 140°, 160°, 170°, etc.
How many 120 angles does it take to make a full turn?
There are 120 degrees in a third of a full turn. To determine this, you need to start with a full turn which is 360 degrees. If a full turn is 360…
What is value of sin 120 degree?
√3/2
Answer: The value of sin 120° is √3/2.
Can a triangle have an angle of 120?
An obtuse-angled triangle is a triangle in which one of the interior angles measures more than 90° degrees. Here, the triangle ABC is an obtuse triangle, as ∠A measures more than 90 degrees. Since, ∠A is 120 degrees, the sum of ∠B and ∠C will be less than 90° degrees.
What do you call a triangle with three equal sides?
Equilateral
Equilateral. An equilateral triangle has three equal sides and angles. It will always have angles of 60° in each corner.
What are the 5 types of angles?
Summary
| Angle Type | Angle measure |
|---|---|
| Acute angle | Greater than 0 °, Less than 90° |
| Right angle | 90° |
| Obtuse angle | Greater than 90°, less than 180° |
| Straight angle | 180° |
How many degrees are in a circle?
By Christina Sloane. Most geometry students learn there are 360 degrees in a circle, 180 degrees in a semicircle and 90 degrees in a quarter of a circle.
How many radians are in a circle?
There are about 6.28318 radians in a circle. The radian is the SI derived unit for angle in the metric system. Radians can be abbreviated as rad, and are also sometimes abbreviated as c, r, or R. For example, 1 radian can be written as 1 rad, 1 c, 1 r, or 1 R. Radians are often expressed using their definition.
How do you measure the angle of a circle?
An angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a “one-degree angle,” and can be used to measure angles.
What is the degree for a circle?
Most geometry students learn there are 360 degrees in a circle, 180 degrees in a semicircle and 90 degrees in a quarter of a circle. If you need to draw a certain angle in a circle, but can’t “eyeball” the degrees, a protractor can help.
