In trigonometry, the cosine function is defined as the ratio of the adjacent side to the hypotenuse. If the angle of a right triangle is equal to 30 degrees, and then the value of cosine at this angle i.e., the value of Cos 30 degree is in a fraction form as √3/2.

108 degrees

Lesson 11.2 Degrees – You can use what you know about angles and fractional parts of a circle to understand angle measurement. – Angles are measured in units called degrees. – Think of a circle divided into 360 equal parts. – An angle that turns through 1/360 of the circle measures 1 degree.

A measure of one degree ( 1° ) is equivalent to a rotation of 1360 of a complete revolution. To measure angles, it is convenient to mark degrees on the circumference of a circle . Thus, a complete revolution is 360° , half a revolution is 180° , a quarter of a revolution is 90° and so forth.

– Acute Angle An acute angle is an angle that is more than 0° but less than 90°. Common examples of acute angles include: 15°, 30°, 45°, 60°, etc.

Subcutaneous injections can be given straight in at a 90 degree angle or at a 45 degree angle. Give the injection at a 90 degree angle if you can grasp 2 inches of skin between your thumb and first finger. Do not touch this area until you give the injection.

We can construct a 90º angle either by bisecting a straight angle or using the following steps.

1. Step 1: Draw the arm PA.
2. Step 2: Place the point of the compass at P and draw an arc that cuts the arm at Q.
3. Step 3: Place the point of the compass at Q and draw an arc of radius PQ that cuts the arc drawn in Step 2 at R.

Then place the compass point at D, and strike a second arc of the same radius and on the same side of the line segment. Make sure those two arcs intersect. Call that point of intersection E. Draw the 90° angle.

two arcs

60 degree angle is an acute angle, as angles smaller than a right angle (less than 90°) are called acute angles. In the case of a geometric angle, the arc is centered at the vertex and constrained by the sides….60 Degree Angle.

An angle whose measure is more than 0° but less than 90° is called an acute angle. Angles having magnitudes 30°, 40°, 60° are all acute angles.

Obtuse Angles It is more than 90° and less than 180°.

A square or rectangle has four corners with right angles. Examples of right angles are all around us. If you draw the diagonals of a square, a rhombus or a kite, the angle at the intersection is 90 degrees and is, therefore, a right angle. Example of a rhombus and a kite with diagonals intersecting at a right angle.

Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees.

Answer: The measure of a Right Angle and Straight Angle is 90 degrees and 180 degrees respectively.

Right Angle (equal to 90°) Straight Angle (exact 180°)

Correct answer: The interior angles of a triangle always add up to 180 degrees. We are given angle and since this is indicated to be a right triangle we know angle is equal to 90 degrees. Thus we know 2 of the 3 and can determine the third angle. Angle is equal to 55 degrees.