Worksheet: Angles, Triangles, and Quadrilaterals for class 5

 

Worksheet: Angles, Triangles, and Quadrilaterals

Section A: Types of Angles

1. Fill in the blanks:

   • An angle measuring less than 90° is called an __________ angle.
   • An angle measuring exactly 90° is a __________ angle.
   • An angle measuring more than 90° but less than 180° is an __________ angle.
   • An angle measuring exactly 180° is called a __________ angle.

2. Match the following:

   • 45° → ______
   • 120° → ______
   • 90° → ______
   • 180° → ______
     (Options: Right angle, Obtuse angle, Straight angle, Acute angle)

3. Identify the type of angle:

   • Draw an angle of 60°. What type of angle is it?
   • Draw an angle of 150°. What type of angle is it?
   • Draw an angle of 90°.

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Section B: Construction of Angles

1. Using a protractor, draw the following angles:

   • 30°
   • 75°
   • 110°
   • 150°

2. Draw any acute angle and name it.

3. Draw any obtuse angle and name it.

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Section C: Types of Triangles

1. Classify the triangles based on their sides:

   • A triangle with all three sides equal is called a __________ triangle.
   • A triangle with two sides equal is called a __________ triangle.
   • A triangle with all sides of different lengths is called a __________ triangle.

2. Classify the triangles based on their angles:

   • A triangle with one angle equal to 90° is called a __________ triangle.
   • A triangle with all angles less than 90° is called a __________ triangle.
   • A triangle with one angle greater than 90° is called a __________ triangle.

3. Draw the following triangles:

   • An equilateral triangle.
   • A right-angled triangle.
   • A scalene triangle.

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Section D: Quadrilaterals

1. Fill in the blanks:

   • A quadrilateral with all sides equal and all angles 90° is called a __________.
   • A quadrilateral with opposite sides equal and parallel is called a __________.
   • A quadrilateral with only one pair of parallel sides is called a __________.
   • A quadrilateral with no equal sides or angles is called a __________.

2. Identify the shapes:

   • Draw and name a square.
   • Draw and name a rectangle.
   • Draw and name a trapezium.

3. Match the following:

   • Square → ______
   • Rectangle → ______
   • Parallelogram → ______
   • Rhombus → ______
     (Options: Opposite sides equal, All sides equal, One pair of parallel sides, Opposite angles equal)

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Section E: Mixed Practice

1. True or False:

   • A triangle has four sides. (___)
   • A square has all angles equal. (___)
   • A rectangle has all sides equal. (___)
   • An obtuse triangle can have a 90° angle. (___)

2. Solve:

• How many diagonals does a quadrilateral have?
• How many angles does a triangle have?
3.