Question

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 1

(a) Scalene triangle
(b) Scalene triangle
(c) Equilateral triangle
(d) Right-angled triangle
(e) Isosceles right-angled triangle
(f) Acute-angled triangle