Page 5 - Lesson Notes
P. 5
Summary :
Check your understanding: (NCERT, Exercise – 5.6) (First one is done for you as an
example)
Q1. Name the types of following triangles:
(a) Triangle with lengths of sides 7 cm, 8 cm and 9 cm.
(b) ∆ABC with AB = 8.7 cm, AC = 7 cm and BC = 6 cm.
(c) ∆PQR such that PQ = QR = PR = 5 cm.
(d) ∆DEF with m ∠D = 90°
(e) ∆XYZ with m ∠Y = 90° and XY = YZ.
(f) ∆LMN with m ∠L = 30°, m ∠M = 70° and m ∠N = 80°.
Answer: (a) All the sides of the triangle are unequal, so it is a
scalene triangle.
