Q

# Look at Fig 6.2 and classify each of the triangles according to its (a) Sides (b) Angles

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

(a) Sides

(b) Angles Views

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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