3.  Look at Fig \small 6.2 and classify each of the triangles according to its

            (a) Sides

            (b) Angles

         

Answers (1)

i) The triangle ABC

Based on Side: In Triangle ABC, Since two sides (BC and AC ) are equal (= 8 cm ) The given triangle is an isosceles triangle.

Based on Angle: In Triangle ABC, Since all the triangles are less than 90 degrees, So the given triangle is Acute angled triangle.

 

ii) The Triangle PQR

Based on Side: In Triangle PQR, All the sides are different so, The given triangle is a scalene triangle.

Based on Angle: In Triangle PQR, Since angle QRP is a right angle, So the given triangle is Right-angled triangle.

 

iii)The Triangle LMN

Based on Side: In Triangle LMN, Since two sides (MN and NL ) are equal (=7 cm ), The given triangle is an isosceles triangle.

Based on Angle: In Triangle LMN, Since angle MNL is an Obtuse angle, So the given triangle is Obtuse angled triangle.

 

iv) The Triangle RST

Based on Side: In Triangle RST, All the sides are equal (=5.2 cm) so, The given triangle is an Equilateral triangle.

Based on Angle: In Triangle RST, Since all the triangles are less than 90 degrees, So the given triangle is Acute angled triangle.

 

v)The triangle ABC

Based on Side: In Triangle ABC, Since two sides (AB and BC ) are equal (= 3 cm ) The given triangle is an isosceles triangle.

Based on Angle: In Triangle ABC, Since angle ABC is greater than 90 degrees  So the given triangle is Obtuse angled triangle.

 

vi)The Triangle PQR

Based on Side: In Triangle PQR, Since two sides (PQ and QR ) are equal (= 6 cm ) The given triangle is an isosceles triangle.

Based on Angle: In Triangle PQR, Since angle PQR is a right angle, So the given triangle is Right-angled triangle.

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