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°.