Definition of Right Angle

A right angle is one of the types of angles that we will encounter during engineering studies.

A right angle is one that measures 90° 90° . We generally mark it with a small square at the area where it is formed.

Right angles can appear in triangles, squares, rectangles, and other geometric shapes with angles of 90° 90° degrees.

A1 - Right Angle Image

To which of the 4 angles shown in the figure does the description of the right angle apply?

what is the definitions of 4 angles

The correct answer is A) 90°

Practice Right angle

Examples with solutions for Right angle

Exercise #1

Choose the appropriate triangle according to the following:

Angle B equals 90 degrees.

Video Solution

Step-by-Step Solution

Let's note in which of the triangles angle B forms a right angle, meaning an angle of 90 degrees.

In answers C+D, we can see that angle B is smaller than 90 degrees.

In answer A, it is equal to 90 degrees.

Answer

AAABBBCCC

Exercise #2

If the two adjacent angles are not equal to each other, then one of them is obtuse and the other acute.

Video Solution

Step-by-Step Solution

The answer is correct because the sum of two acute angles will be less than 180 degrees and the sum of two obtuse angles will be greater than 180 degrees

Answer

True

Exercise #3

True or false?

One of the angles in a rectangle may be an acute angle.

Video Solution

Step-by-Step Solution

One of the properties of a rectangle is that all its angles are right angles.

Therefore, it is not possible for an angle to be acute, that is, less than 90 degrees.

Answer

False

Exercise #4

True or false?

An acute angle is smaller than a right angle.

Step-by-Step Solution

The definition of an acute angle is an angle that is smaller than 90 degrees.

Since an angle that equals 90 degrees is a right angle, the answer is correct.

Answer

True

Exercise #5

Which figure depicts a right angle?

Video Solution

Step-by-Step Solution

A right angle is equal to 90 degrees. In diagrams A+C, we see that the angle symbol is a symbol representing an angle that equals 90 degrees.

Answer

Exercise #6

Does the drawing show an adjacent angle?

Video Solution

Answer

Not true

Exercise #7

Does the drawing show an adjacent angle?

Video Solution

Answer

Not true

Exercise #8

Does the drawing show an adjacent angle?

Video Solution

Answer

True

Exercise #9

Does the drawing show an adjacent angle?

Video Solution

Answer

Not true

Exercise #10

Does the drawing show an adjacent angle?

Video Solution

Answer

Not true

Exercise #11

Does the drawing show an adjacent angle?

Video Solution

Answer

Not true

Exercise #12

Does the drawing show an adjacent angle?

Video Solution

Answer

Not true

Exercise #13

True or false?

The sum of two acute angles can be greater than 180 degrees?

Video Solution

Answer

False.

Exercise #14

Which figure shows a right angle?

Video Solution

Answer

Exercise #15

Which of the angles is not an obtuse angle?

Video Solution

Answer

Topics learned in later sections

  1. Acute Angles
  2. Obtuse Angle
  3. Plane angle
  4. Angle Notation
  5. Angle Bisector
  6. Sides, Vertices, and Angles
  7. Types of Angles
  8. Sum and Difference of Angles
  9. Sum of Angles in a Polygon
  10. The Sum of the Interior Angles of a Triangle
  11. Exterior angles of a triangle