NCERT Class 9
Example 8 : In Fig.6.38, the sides AB and AC of ∆ABC are produced to point E and D respectively. If bisectors BO and CO of angle CBE and angle BCD respectively meet at point O, then prove that angle BOC = 90°-1/2angle BAC.
15
Oct
Example 8 : In Fig.6.38, the sides AB and AC of ∆ABC are produced to point E and D respectively. If bisectors BO and CO of angle CBE and angle BCD respectively meet at point O, then prove that angle BOC = 90°-1/2angle BAC. Example 8 : In Fig.6.38 the sides AB and AC of [...]
Example 5 : If a transversal intersects two lines such that the bisectors of a pair of corresponding angles are parallel, then prove that the two lines are parallel.
15
Oct
Example 5 : If a transversal intersects two lines such that the bisectors of a pair of corresponding angles are parallel, then prove that the two lines are parallel. Example 5 : If a transversal intersects two lines such that the bisectors of a pair of corresponding angles are parallel then prove that the two [...]
Example 4 : In fig .6.24,if PQ//RS, angle MXQ =135 and angle MYR =40 , find angle XMY.
15
Oct
Example 4 : In fig .6.24,if PQ//RS, angle MXQ =135 and angle MYR =40 , find angle XMY. angle MXQ =135 and angle MYR =40 Example 4 : In fig .6.24 find angle XMY. if PQ || RS October 15, 2020 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class 9 ,
Example 3 : In figure, OP, OQ, OR and OS are four rays. Prove that ∠ POQ + ∠ QOR + ∠ SOR + ∠ POS = 360°.
15
Oct
Example 3 : In figure, OP, OQ, OR and OS are four rays. Prove that ∠ POQ + ∠ QOR + ∠ SOR + ∠ POS = 360°. Example 3 : In figure OP OQ OR and OS are four rays. Prove that ∠ POQ + ∠ QOR + ∠ SOR + ∠ POS = [...]
In Fig.6.10,ray OS stands on a line POQ . Ray OR and ray OT are angle bisector of angle POS and angle SOQ, respectively . If angle POS=x, find angle ROT.
15
Oct
In Fig.6.10,ray OS stands on a line POQ . Ray OR and ray OT are angle bisector of angle POS and angle SOQ, respectively . If angle POS=x, find angle ROT. find angle ROT. In Fig.6.10 ray OS stands on a line POQ . Ray OR and ray OT are angle bisector of angle POS [...]
Example 1 In Fig, lines PQ and RS intersect each other at point O. If ∠ POR : ∠ ROQ = 5 : 7, find all the angles.
15
Oct
Example 1 In Fig, lines PQ and RS intersect each other at point O. If ∠ POR : ∠ ROQ = 5 : 7, find all the angles. Example 1 In Fig find all the angles. lines PQ and RS intersect each other at point O. If ∠ POR : ∠ ROQ = 5 : [...]
6. In Fig. 6.44, the side QR of ΔPQR is produced to a point S. If the bisectors of angle PQR and angle PRS meet at point T, then prove that angle QTR = ½ angle QPR.
15
Oct
6. In Fig. 6.44, the side QR of ΔPQR is produced to a point S. If the bisectors of angle PQR and angle PRS meet at point T, then prove that angle QTR = ½ angle QPR. 6. In Fig. 6.44 the side QR of ΔPQR is produced to a point S. If the bisectors [...]
4. In Fig. 6.42, if lines PQ and RS intersect at point T, such that angle PRT = 40°, angle RPT = 95° and angle TSQ = 75°, find angle SQT.
15
Oct
4. In Fig. 6.42, if lines PQ and RS intersect at point T, such that angle PRT = 40°, angle RPT = 95° and angle TSQ = 75°, find angle SQT. 4. In Fig. 6.42 angle RPT = 95° and angle TSQ = 75° find angle SQT. if lines PQ and RS intersect at point [...]
3. In Fig. 6.41, if AB ll DE, angle BAC = 35° and angle CDE = 53°, find angle DCE.
15
Oct
3. In Fig. 6.41, if AB ll DE, angle BAC = 35° and angle CDE = 53°, find angle DCE. 3. In Fig. 6.41 angle BAC = 35° and angle CDE = 53° find angle DCE. if AB ll DE October 15, 2020 Category: Chapter 6 - Lines and Angles , Maths , NCERT Class [...]
2. In Fig. 6.40, angle X = 62°, angle XYZ = 54°. If YO and ZO are the bisectors of angle XYZ and angle XZY respectively of Δ XYZ, find angle OZY and angle YOZ.
15
Oct
2. In Fig. 6.40, angle X = 62°, angle XYZ = 54°. If YO and ZO are the bisectors of angle XYZ and angle XZY respectively of Δ XYZ, find angle OZY and angle YOZ. 2. In Fig. 6.40 angle X = 62° angle XYZ = 54°. If YO and ZO are the bisectors of [...]