NCERT Class 9
In triangles ABC and DEF, ∠A = ∠D, ∠B = ∠E and AB = EF. Will the two triangles be congruent? Give reasons for your answer.
30
Jun
In triangles ABC and DEF, ∠A = ∠D, ∠B = ∠E and AB = EF. Will the two triangles be congruent? Give reasons for your answer. ∠A = ∠D ∠B = ∠E and AB = EF. Will the two triangles be congruent? Give reasons for your answer. In triangles ABC and DEF June 30, 2021 [...]
In the two triangles ABC and DEF, AB = DE and AC = EF. Name two angles from the two triangles that must be equal so that the two triangles are congruent. Give reason for your answer.
30
Jun
In the two triangles ABC and DEF, AB = DE and AC = EF. Name two angles from the two triangles that must be equal so that the two triangles are congruent. Give reason for your answer. AB = DE and AC = EF. Name two angles from the two triangles that must be equal [...]
If ∆ ABC ≅ ∆ PQR and ∆ ABC is not congruent to ∆ RPQ, then which of the following is not true:
30
Jun
If ∆ ABC ≅ ∆ PQR and ∆ ABC is not congruent to ∆ RPQ, then which of the following is not true: If ∆ ABC ≅ ∆ PQR and ∆ ABC is not congruent to ∆ RPQ then which of the following is not true: June 30, 2021 Category: Chapter 7 - Triangles , [...]
21. ABCD is quadrilateral such that AB = AD and CB = CD. Prove that AC is the perpendicular bisector of BD.
30
Jun
21. ABCD is quadrilateral such that AB = AD and CB = CD. Prove that AC is the perpendicular bisector of BD. 21. ABCD is quadrilateral such that AB = AD and CB = CD. Prove that AC is the perpendicular bisector of BD. June 30, 2021 Category: Chapter 7 - Triangles , Maths , [...]
20. Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than 2/3 of a right angle.
30
Jun
20. Prove that in a triangle, other than an equilateral triangle, angle opposite the longest side is greater than 2/3 of a right angle. 20. Prove that in a triangle angle opposite the longest side is greater than 2/3 of a right angle. other than an equilateral triangle June 30, 2021 Category: Chapter 7 - [...]
19. AB and CD are the smallest and largest sides of a quadrilateral ABCD. Out of ∠B and ∠D decide which is greater.
30
Jun
19. AB and CD are the smallest and largest sides of a quadrilateral ABCD. Out of ∠B and ∠D decide which is greater. 19. AB and CD are the smallest and largest sides of a quadrilateral ABCD. Out of ∠B and ∠D decide which is greater. June 30, 2021 Category: Chapter 7 - Triangles , [...]
18. ABC is a right triangle such that AB = AC and bisector of angle C intersects the side AB at D. Prove that AC + AD = BC.
30
Jun
18. ABC is a right triangle such that AB = AC and bisector of angle C intersects the side AB at D. Prove that AC + AD = BC. 18. ABC is a right triangle such that AB = AC and bisector of angle C intersects the side AB at D. Prove that AC + [...]
17. ABCD is a quadrilateral such that diagonal AC bisects the angles A and C. Prove that AB = AD and CB = CD.
30
Jun
17. ABCD is a quadrilateral such that diagonal AC bisects the angles A and C. Prove that AB = AD and CB = CD. 17. ABCD is a quadrilateral such that diagonal AC bisects the angles A and C. Prove that AB = AD and CB = CD. June 30, 2021 Category: Chapter 7 - [...]
16. Line segment joining the mid-points M and N of parallel sides AB and DC, respectively of a trapezium ABCD is perpendicular to both the sides AB and DC. Prove that AD = BC.
30
Jun
16. Line segment joining the mid-points M and N of parallel sides AB and DC, respectively of a trapezium ABCD is perpendicular to both the sides AB and DC. Prove that AD = BC. 16. Line segment joining the mid-points M and N of parallel sides AB and DC respectively of a trapezium ABCD is [...]
15. Two lines l and m intersect at the point O and P is a point on a line n passing through the point O such that P is equidistant from l and m. Prove that n is the bisector of the angle formed by l and m.
30
Jun
15. Two lines l and m intersect at the point O and P is a point on a line n passing through the point O such that P is equidistant from l and m. Prove that n is the bisector of the angle formed by l and m. 1. Find all the angles of an [...]