Q.1 Name the types of following triangles:
(a) Triangle with lengths of sides 7 cm, 8 cm and 9 cm.
(b) \(\triangle \) ABC with AB = 8.7 cm, AC = 7 cm and BC = 6 cm.
(c) \(\triangle \)PQR such that PQ = QR = PR = 5 cm.
(d) \(\triangle \)DEF with \(\angle \)D = 90°
(e) \(\triangle \)XYZ with \(\angle \)Y = 90° and XY = YZ.
(f) \(\triangle \)LMN with \(\angle \)L = 30°, ?M = 70° and ?N = 80°.


Answer :

(a) Scalene triangle
(b) Scalene triangle
(c) Equilateral triangle
(d) Right angled triangle
(e) Right angled isosceles triangle
(f) Acute angled triangle

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