NCERT Class 9
2. Bisectors of interior ∠B and exterior ∠ACD of a ∆ABC intersect at the point T. Prove that ∠BTC= 1/2∠BAC.
30
Jun
2. Bisectors of interior ∠B and exterior ∠ACD of a ∆ABC intersect at the point T. Prove that ∠BTC= 1/2∠BAC. 2. Bisectors of interior ∠B and exterior ∠ACD of a ∆ABC intersect at the point T. Prove that ∠BTC= 1/2∠BAC. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class [...]
1. If two lines intersect, prove that the vertically opposite angles are equal.
30
Jun
1. If two lines intersect, prove that the vertically opposite angles are equal. 1. If two lines intersect prove that the vertically opposite angles are equal. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
10. Two lines are respectively perpendicular to two parallel lines. Show that they are parallel to each other.
30
Jun
10. Two lines are respectively perpendicular to two parallel lines. Show that they are parallel to each other. 10. Two lines are respectively perpendicular to two parallel lines. Show that they are parallel to each other. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
9. A triangle ABC is right angled at A. L is a point on BC such that AL ⊥ BC. Prove that ∠BAL = ∠ACB.
30
Jun
9. A triangle ABC is right angled at A. L is a point on BC such that AL ⊥ BC. Prove that ∠BAL = ∠ACB. 9. A triangle ABC is right angled at A. L is a point on BC such that AL ⊥ BC. Prove that ∠BAL = ∠ACB. June 30, 2021 Category: Chapter [...]
8.The angles of a triangle are in the ratio 2 : 3 : 4. Find the angles of the triangle.
30
Jun
8.The angles of a triangle are in the ratio 2 : 3 : 4. Find the angles of the triangle. 8.The angles of a triangle are in the ratio 2 : 3 : 4. Find the angles of the triangle. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class [...]
7. In the given figure, DE || QR and AP and BP are bisectors of ∠EAB and ∠RBA, respectively. Find ∠APB.
30
Jun
7. In the given figure, DE || QR and AP and BP are bisectors of ∠EAB and ∠RBA, respectively. Find ∠APB. 7. In the given figure DE || QR and AP and BP are bisectors of ∠EAB and ∠RBA respectively. Find ∠APB. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , [...]
6. In the given figure, BA || ED and BC || EF. Show that ∠ABC + ∠DEF = 180°.
30
Jun
6. In the given figure, BA || ED and BC || EF. Show that ∠ABC + ∠DEF = 180°. 6. In the given figure BA || ED and BC || EF. Show that ∠ABC + ∠DEF = 180°. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
5. In given figure, BA || ED and BC || EF. Show that ∠ABC = ∠DEF. [Hint: Produce DE to intersect BC at P (say)].
30
Jun
5. In given figure, BA || ED and BC || EF. Show that ∠ABC = ∠DEF. [Hint: Produce DE to intersect BC at P (say)]. 5. In given figure BA || ED and BC || EF. Show that ∠ABC = ∠DEF. [Hint: Produce DE to intersect BC at P (say)]. June 30, 2021 Category: Chapter [...]
4. If in the given figure, bisectors AP and BQ of the alternate interior angles are parallel, then show that l || m.
30
Jun
4. If in the given figure, bisectors AP and BQ of the alternate interior angles are parallel, then show that l || m. 4. If in the given figure bisectors AP and BQ of the alternate interior angles are parallel then show that l || m. June 30, 2021 Category: Chapter 6 - Lines and [...]
3. AP and BQ are the bisectors of the two alternate interior angles formed by the intersection of a transversal t with parallel lines l and m (in the given figure). Show that AP || BQ.
30
Jun
3. AP and BQ are the bisectors of the two alternate interior angles formed by the intersection of a transversal t with parallel lines l and m (in the given figure). Show that AP || BQ. 3. AP and BQ are the bisectors of the two alternate interior angles formed by the intersection of a [...]