# mathsphy Maths NO MORE scary

S No. Topic Video
61 6.5 Q14 The perpendicular from A on side BC of a tri. ABC intersects BC at D such that DB = 3CD. Prove that.....
62 6.5 Q15 In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3BC. Prove that ............
63 6.5 Q16 In an equilateral triangle, prove that three times the square of one side is equal to four times the square of one of its altitudes.
64 6.5 Q17 Tick the correct answer and justify: In tri. ABC, AB = 6 root 3 cm, AC = 12 cm and BC = 6 cm. The angle B is:...
Topic/Video

61 6.5 Q14 The perpendicular from A on side BC of a tri. ABC intersects BC at D such that DB = 3CD. Prove that.....

62 6.5 Q15 In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3BC. Prove that ............

63 6.5 Q16 In an equilateral triangle, prove that three times the square of one side is equal to four times the square of one of its altitudes.

64 6.5 Q17 Tick the correct answer and justify: In tri. ABC, AB = 6 root 3 cm, AC = 12 cm and BC = 6 cm. The angle B is:...