Name the types of following triangles:(a) Triangle with lengths of sid

1.	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) ∆ DEE 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) Triangle with lengths of sides 7 cm,8 cm, and 9 cm. Scalene triangle (b) ∆ ABC with AB = 8.7 cm, AC = 7 cm, and BC = 6 cm. Scalene triangle (c) ∆ PQR such that PQ = QR = PR = 5 cm. Equilateral triangle (d) ∆ DEE with m∠D = 90° Right – angled triangle (e) ∆ XYZ with m∠Y = 90°and XY = YZ Right – angled isosceles triangle (f) ∆ LMN with m∠L = 30°, m∠M = 70° and m∠N = 80° Acute angled triangle.

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) ∆ DEE 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) Triangle with lengths of sides 7 cm,8 cm, and 9 cm.

Scalene triangle

(b) ∆ ABC with AB = 8.7 cm, AC = 7 cm, and BC = 6 cm.
Scalene triangle

(d) ∆ DEE with m∠D = 90°

Right – angled triangle

(e) ∆ XYZ with m∠Y = 90°and XY = YZ

Right – angled isosceles triangle

(f) ∆ LMN with m∠L = 30°, m∠M = 70° and m∠N = 80°

Acute angled triangle.