An obtuse angle is an angle that measures more than degrees, but less than degrees.
Acute angles can appear in triangles, parallelograms, and other geometric shapes.
Obtuse Angle
Obtuse Angle
Test yourself on types of angles (right, acute, obtuse, flat)!
\( ∢\text{ABC} \) equal to 90°.
What angle is it?
Examples and Exercises with Solutions for Obtuse Angles
Exercise #1
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 #2
If the two adjacent angles are not equal to each other, then one of them is obtuse and the other acute.
Video Solution
Answer
True
Exercise #3
Which figure depicts a right angle?
Video Solution
Answer
Exercise #4
Which of the following angles are obtuse?
Video Solution
Answer
None of the options
Exercise #5
Choose the appropriate triangle according to the following:
Angle B equals 90 degrees.
Video Solution
Answer
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Test your knowledge
Question 1
What type of angle is
\( ∢\text{ABC} \) ?
Question 2
\( ∢\text{ABC} \) is an angle measuring less than 90°.
What kind of angle angle is it?
Question 3
right angle?
Related Subjects
- Area
- Trapezoids
- Area of a trapezoid
- Perimeter of a trapezoid
- Parallelogram
- The area of a parallelogram: what is it and how is it calculated?
- Perimeter of a Parallelogram
- Kite
- Area of a Deltoid (Kite)
- Parallel lines
- Angles In Parallel Lines
- Alternate angles
- Corresponding angles
- Collateral angles
- Vertically Opposite Angles
- Adjacent angles
- Rectangle
- Calculating the Area of a Rectangle
- The perimeter of the rectangle
- Congruent Rectangles
- The Sum of the Interior Angles of a Triangle
- The sides or edges of a triangle
- Triangle Height
- Sides, Vertices, and Angles
- Angle Notation
- Angle Bisector
- Types of Angles
- Sum and Difference of Angles
- Sum of Angles in a Polygon
- Perpendicular Lines
- Exterior angles of a triangle
- Perimeter
- Triangle
- Types of Triangles
- Obtuse Triangle
- Equilateral triangle
- Identification of an Isosceles Triangle
- Scalene triangle
- Acute triangle
- Isosceles triangle
- The Area of a Triangle
- Area of a right triangle
- Area of Isosceles Triangles
- Area of a Scalene Triangle
- Area of Equilateral Triangles
- Perimeter of a triangle
