# mathsphy Maths NO MORE scary

S No. Topic Video
41 6.4 Q3 ABC and DBC are two triangles on the same base BC......show that area (Tri. ABC)/area (Tri. DBC) = AO/DO.
42 6.4 Q4 If the areas of two similar triangles are equal, prove that they are congruent.
43 6.4 Q5 D, E and F are respectively the mid-points.......Find the ratio of the area of Tri. DEF and Tri. ABC.
44 6.4 Q6 Prove that the ratio of the areas of two similar triangles is equal to the square of the ratio.........
45 6.4 Q7 Prove that the area of an equilateral triangle described on one side of a square is equal to half the area .......
46 6.4 Q8 ABC and BDE are two equilateral triangles....... Ratio of the area of triangles ABC and BDE is (A) 2 : 1.....
47 6.4 Q9 Sides of two similar triangles are in the ratio 4 : 9. Areas of these triangles are in the ratio (A) 2 : 3......
48 6.5 Q1 Sides of triangles are given below. Determine which of them are right triangles? ........
49 6.5 Q2 PQR is a triangle right angled at P and M is a point on QR such that PM perp. to QR. Show that Square of PM = QM × MR.
50 6.5 Q3 ABD is a triangle right angled at A and AC Perp. to BD. Show that (i) Square of AB= BC × BD........
Topic/Video

41 6.4 Q3 ABC and DBC are two triangles on the same base BC......show that area (Tri. ABC)/area (Tri. DBC) = AO/DO.

42 6.4 Q4 If the areas of two similar triangles are equal, prove that they are congruent.

43 6.4 Q5 D, E and F are respectively the mid-points.......Find the ratio of the area of Tri. DEF and Tri. ABC.

44 6.4 Q6 Prove that the ratio of the areas of two similar triangles is equal to the square of the ratio.........

45 6.4 Q7 Prove that the area of an equilateral triangle described on one side of a square is equal to half the area .......

46 6.4 Q8 ABC and BDE are two equilateral triangles....... Ratio of the area of triangles ABC and BDE is (A) 2 : 1.....

47 6.4 Q9 Sides of two similar triangles are in the ratio 4 : 9. Areas of these triangles are in the ratio (A) 2 : 3......

48 6.5 Q1 Sides of triangles are given below. Determine which of them are right triangles? ........

49 6.5 Q2 PQR is a triangle right angled at P and M is a point on QR such that PM perp. to QR. Show that Square of PM = QM × MR.

50 6.5 Q3 ABD is a triangle right angled at A and AC Perp. to BD. Show that (i) Square of AB= BC × BD........