Chapter 7 – Triangles
Example 3 : Line-segment AB is parallel to another line-segment CD. O is the mid-point of AD (see Fig. 7.15). Show that (i) ΔAOB≅ΔDOC (ii) O is also the mid-point of BC.
15
Oct
Example 3 : Line-segment AB is parallel to another line-segment CD. O is the mid-point of AD (see Fig. 7.15). Show that (i) ΔAOB≅ΔDOC (ii) O is also the mid-point of BC. Example 3 : Line-segment AB is parallel to another line-segment CD. O is the mid-point of AD (see Fig. 7.15). Show that (i) [...]
Example 2 : AB is a line segment and line l is its perpendicular bisector. If a point P lies on l, show that P is equidistant from A and B.
15
Oct
Example 2 : AB is a line segment and line l is its perpendicular bisector. If a point P lies on l, show that P is equidistant from A and B. Example 2 : AB is a line segment and line l is its perpendicular bisector. If a point P lies on l show that [...]
Example 1 In Fig. , OA = OB and OD = OC. Show that (i) ∆ AOD ≅ ∆ BOC and (ii) AD || BC.
15
Oct
Example 1 In Fig. , OA = OB and OD = OC. Show that (i) ∆ AOD ≅ ∆ BOC and (ii) AD || BC. Example 1 In Fig OA = OB and OD = OC. Show that (i) ∆ AOD ≅ ∆ BOC and (ii) AD || BC. October 15, 2020 Category: Chapter 7 [...]
5. In Fig 7.51, PR > PQ and PS bisect angle QPR. Prove that angle PSR > angle PSQ.
15
Oct
5. In Fig 7.51, PR > PQ and PS bisect angle QPR. Prove that angle PSR > angle PSQ. 5. In Fig 7.51 PR > PQ and PS bisect angle QPR. Prove that angle PSR > angle PSQ. October 15, 2020 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
6. Show that of all line segments drawn from a given point not on it, the perpendicular line segment is the shortest.
15
Oct
6. Show that of all line segments drawn from a given point not on it, the perpendicular line segment is the shortest. 6. Show that of all line segments drawn from a given point not on it the perpendicular line segment is the shortest. October 15, 2020 Category: Chapter 7 - Triangles , Maths , [...]
4. AB and CD are respectively the smallest and longest sides of a quadrilateral ABCD (see Fig. 7.50). Show that angle A > angle C and angle B > angle D.
15
Oct
4. AB and CD are respectively the smallest and longest sides of a quadrilateral ABCD (see Fig. 7.50). Show that angle A > angle C and angle B > angle D. 4. AB and CD are respectively the smallest and longest sides of a quadrilateral ABCD (see Fig. 7.50). Show that angle A > angle [...]
3. In Fig. 7.49, angle B < angle A and angle C < angle D. Show that AD < BC.
15
Oct
3. In Fig. 7.49, angle B < angle A and angle C < angle D. Show that AD < BC. 3. In Fig. 7.49 angle B < angle A and angle C < angle D. Show that AD < BC. October 15, 2020 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
2. In Fig. 7.48, sides AB and AC of ΔABC are extended to points P and Q respectively. Also, angle PBC AB.
15
Oct
2. In Fig. 7.48, sides AB and AC of ΔABC are extended to points P and Q respectively. Also, angle PBC AB. 2. In Fig. 7.48 angle PBC AB. sides AB and AC of ΔABC are extended to points P and Q respectively. Also October 15, 2020 Category: Chapter 7 - Triangles , Maths , [...]
1. Show that in a right-angled triangle, the hypotenuse is the longest side.
15
Oct
1. Show that in a right-angled triangle, the hypotenuse is the longest side. 1. Show that in a right-angled triangle the hypotenuse is the longest side. October 15, 2020 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
5. ABC is an isosceles triangle with AB = AC. Draw AP ⊥ BC to show that angle B = angle C.
15
Oct
5. ABC is an isosceles triangle with AB = AC. Draw AP ⊥ BC to show that angle B = angle C. 5. ABC is an isosceles triangle with AB = AC. Draw AP ⊥ BC to show that angle B = angle C. October 15, 2020 Category: Chapter 7 - Triangles , Maths , [...]