Chapter 7 – Triangles
4. In Δ ABC, BC = AB and ∠B = 80°. Then ∠A is equal to
30
Jun
4. In Δ ABC, BC = AB and ∠B = 80°. Then ∠A is equal to 4. In Δ ABC BC = AB and ∠B = 80°. Then ∠A is equal to June 30, 2021 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
3. In Δ ABC, AB = AC and ∠B = 50°. Then ∠C is equal to
30
Jun
3. In Δ ABC, AB = AC and ∠B = 50°. Then ∠C is equal to 3. In Δ ABC AB = AC and ∠B = 50°. Then ∠C is equal to June 30, 2021 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
2. If AB = QR, BC = PR and CA = PQ, then
30
Jun
2. If AB = QR, BC = PR and CA = PQ, then 2. If AB = QR BC = PR and CA = PQ then June 30, 2021 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
1. Which of the following is not a criterion for congruence of triangles?
30
Jun
1. Which of the following is not a criterion for congruence of triangles? 1. Which of the following is not a criterion for congruence of triangles? June 30, 2021 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 ,
Example 9 : D is a point on side BC of Δ ABC such that AD = AC (see figure). Show that AB > AD.
15
Oct
Example 9 : D is a point on side BC of Δ ABC such that AD = AC (see figure). Show that AB > AD. Example 9 : D is a point on side BC of Δ ABC such that AD = AC (see figure). Show that AB > AD. October 15, 2020 Category: Chapter [...]
Example 8 : P is a point equidistant from two lines l and m intersecting at point A (see figure). Show that the line AP bisects the angle between them.
15
Oct
Example 8 : P is a point equidistant from two lines l and m intersecting at point A (see figure). Show that the line AP bisects the angle between them. Example 8 : P is a point equidistant from two lines l and m intersecting at point A (see figure). Show that the line AP [...]
Example 7 : AB is a line segment P and Q are point on opposite sides of AB such that each of them is equidistant from the points A and B . Show that the line PQ is perpendicular bisector of AB .
15
Oct
Example 7 : AB is a line segment P and Q are point on opposite sides of AB such that each of them is equidistant from the points A and B . Show that the line PQ is perpendicular bisector of AB . Example 7 : AB is a line segment P and Q are [...]
Example 6 : In an isosceles triangle ABC with AB = AC, D and E are points on BC such that BE = CD (see figure). Show that AD = AE.
15
Oct
Example 6 : In an isosceles triangle ABC with AB = AC, D and E are points on BC such that BE = CD (see figure). Show that AD = AE. D and E are points on BC such that BE = CD (see figure). Show that AD = AE. Example 6 : In an [...]
Example 5 : E and F are respectively the mid-points of equal sides AB and AC of ∆ ABC (see figure). Show that BF = CE.
15
Oct
Example 5 : E and F are respectively the mid-points of equal sides AB and AC of ∆ ABC (see figure). Show that BF = CE. Example 5 : E and F are respectively the mid-points of equal sides AB and AC of ∆ ABC (see figure). Show that BF = CE. October 15, 2020 [...]
Example 4 : In triangle abc the bisector ad of angle a is perpendicular to side bc show that ab = bc and triangle abc is an isosceles triangle’
15
Oct
Example 4 : In triangle abc the bisector ad of angle a is perpendicular to side bc show that ab = bc and triangle abc is an isosceles triangle’ Example 4 : In triangle abc the bisector ad of angle a is perpendicular to side bc show that ab = bc and triangle abc is [...]