Chapter 6 – Lines and Angles
Bisector of angles ∠B and ∠C of a triangle ABC intersect each other at a point O, Then prove that ∠BOC = 90 degree + 1/2∠A.
30
Jun
Bisector of angles ∠B and ∠C of a triangle ABC intersect each other at a point O, Then prove that ∠BOC = 90 degree + 1/2∠A. Bisector of angles ∠B and ∠C of a triangle ABC intersect each other at a point O Then prove that ∠BOC = 90 degree + 1/2∠A. June 30, 2021 [...]
Prove that the sum of the three angles of a triangle is 180 degree.
30
Jun
Prove that the sum of the three angles of a triangle is 180 degree. Prove that the sum of the three angles of a triangle is 180 degree. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
In the given figure, m and n are two plane mirrors perpendicular to each other. Show that the incident ray CA is parallel to the reflected ray BD.
30
Jun
In the given figure, m and n are two plane mirrors perpendicular to each other. Show that the incident ray CA is parallel to the reflected ray BD. In the given figure m and n are two plane mirrors perpendicular to each other. Show that the incident ray CA is parallel to the reflected ray [...]
In fig. 6.8, x = y and a = b. Prove that l || n.
30
Jun
In fig. 6.8, x = y and a = b. Prove that l || n. In fig. 6.8 x = y and a = b. Prove that l || n. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
In fig. 6.7, AB, CD and EF are three lines concurrent at O. Find the value of y.
30
Jun
In fig. 6.7, AB, CD and EF are three lines concurrent at O. Find the value of y. AB CD and EF are three lines concurrent at O. Find the value of y. In fig. 6.7 June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
A transversal intersects two lines in such a way that the two interior angle on the same side of transversal are equal. Will the two lines always be parallel? Give reason for your answer.
30
Jun
A transversal intersects two lines in such a way that the two interior angle on the same side of transversal are equal. Will the two lines always be parallel? Give reason for your answer. A transversal intersects two lines in such a way that the two interior angle on the same side of transversal are [...]
Let OA, OB, OC and OD are rays in the anticlockwise direction such that ∠ AOB = ∠COD = 100°, ∠BOC = 82° and ∠AOD = 78°. Is it true to say that AOC and BOD are lines?
30
Jun
Let OA, OB, OC and OD are rays in the anticlockwise direction such that ∠ AOB = ∠COD = 100°, ∠BOC = 82° and ∠AOD = 78°. Is it true to say that AOC and BOD are lines? ∠BOC = 82° and ∠AOD = 78°. Is it true to say that AOC and BOD are [...]
If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2:3 then the greater of the two angles is
30
Jun
If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2:3 then the greater of the two angles is If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2:3 then the greater of the two angles [...]
7. In the given figure, ∠Q > ∠R, PA is the bisector of ∠QPR and PM ⊥ QR. Prove that ∠APM = 1/2(∠Q – ∠R).
30
Jun
7. In the given figure, ∠Q > ∠R, PA is the bisector of ∠QPR and PM ⊥ QR. Prove that ∠APM = 1/2(∠Q – ∠R). ∠Q > ∠R 7. In the given figure PA is the bisector of ∠QPR and PM ⊥ QR. Prove that ∠APM = 1/2(∠Q – ∠R). June 30, 2021 Category: Chapter [...]
6. Prove that a triangle must have atleast two acute angles.
30
Jun
6. Prove that a triangle must have atleast two acute angles. 6. Prove that a triangle must have atleast two acute angles. June 30, 2021 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,