# mathsphy Maths NO MORE scary

S No. Topic Video
21 7.2 Q3 ABC is an isosceles triangle in which altitudes BE and CF are drawn to equal sides AC and AB respectively. Show that these altitudes are equal
22 7.2 Q4 ABC is a triangle in which altitudes BE and CF to sides AC and AB are equal. Show that
23 7.2 Q5 ABC and DBC are two isosceles triangles on the same base BC. Show that ABD = ACD.
24 7.2 Q6 Triangle ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB. Show that angle BCD is a right angle.
25 7.2 Q7 ABC is a right angled triangle in which angle A = 90 deg and AB = AC. Find angle B and C.
26 7.2 Q8 Ex: 7.2 Q8 Show that angles of an equilateral triangle is 60 deg each.
27 7.3 Q1 ABC and DBC are two isosceles triangles on the same base BC and vertices A and D are on the same side of BC. If AD is extended to intersect BC at P, show that
28 7.3 Q2 AD is an altitude of an isosceles triangle ABC in which AB = AC. Show that (i) AD bisects BC (ii) AD bisects angle A.
29 7.3 Q3 Two sides AB and BC and median AM of one triangle ABC are respectively equal to sides PQ and QR and median PN of tri PQR. Show that:
30 7.3 Q4 BE and CF are two equal altitudes of a triangle ABC. Using RHS congruence rule, prove that the triangle ABC is isosceles.
Topic/Video

21 7.2 Q3 ABC is an isosceles triangle in which altitudes BE and CF are drawn to equal sides AC and AB respectively. Show that these altitudes are equal

22 7.2 Q4 ABC is a triangle in which altitudes BE and CF to sides AC and AB are equal. Show that

23 7.2 Q5 ABC and DBC are two isosceles triangles on the same base BC. Show that ABD = ACD.

24 7.2 Q6 Triangle ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB. Show that angle BCD is a right angle.

25 7.2 Q7 ABC is a right angled triangle in which angle A = 90 deg and AB = AC. Find angle B and C.

26 7.2 Q8 Ex: 7.2 Q8 Show that angles of an equilateral triangle is 60 deg each.

27 7.3 Q1 ABC and DBC are two isosceles triangles on the same base BC and vertices A and D are on the same side of BC. If AD is extended to intersect BC at P, show that

28 7.3 Q2 AD is an altitude of an isosceles triangle ABC in which AB = AC. Show that (i) AD bisects BC (ii) AD bisects angle A.

29 7.3 Q3 Two sides AB and BC and median AM of one triangle ABC are respectively equal to sides PQ and QR and median PN of tri PQR. Show that:

30 7.3 Q4 BE and CF are two equal altitudes of a triangle ABC. Using RHS congruence rule, prove that the triangle ABC is isosceles.