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### MEAP Preparation - Grade 5 Mathematics3.3 Classifying Triangles by Angles

#### Classification of triangles based on angles

1. Acute angled triangle:

• If all the angles of a triangle are acute angles, then it is called an acute angled triangle.

• 2. Right angled triangle:
• A triangle in which one of the angles is a right angle is called a right angled triangle.

• In a right angled triangle, the side opposite to the right angle is called its hypotenuse.

•  3. Obtuse angled triangle:
• A triangle containing an obtuse angle is called an obtuse angled triangle.

• Directions: Read the above properties of triangles and answer the following questions:
1. Illustrate each of the above properties by drawing a triangle.
2. Write in your own words, how to classify triangles according to their angles.

 Q 1: The side opposite to the right angle in a right angled triangle is called the ________ of the triangle.Answer: Q 2: If the angles of a triangle are given by 100 degrees, 30 degrees and 50 degrees, then the triangle is an right angled triangle.TrueFalse Q 3: The angles 70 degrees, 80 degrees and 30 degrees represents the angles of an acute angled triangle.FalseTrue Q 4: In a triangle the angles are given by 55 degrees, 25 degrees and 100 degrees. The triangle is a (an) ________.Acute angled scalene triangleObtuse angled scalene triangleRight angled scalene triangle Question 5: This question is available to subscribers only! Question 6: This question is available to subscribers only!