Maths
13. In fig. 6.20, l II m and line segments AB, CD and EF are concurrent at point P. Prove that AE / BF = AC / BD = CE / FD.
05
Jul
13. In fig. 6.20, l II m and line segments AB, CD and EF are concurrent at point P. Prove that AE / BF = AC / BD = CE / FD. 13. In fig. 6.20 CD and EF are concurrent at point P. Prove that AE / BF = AC / BD = CE [...]
12. In a quadrilateral ABCD, ∠A + ∠D = 90°. Prove that AC^2 + BD^2 = AD^2 + BC^2
05
Jul
12. In a quadrilateral ABCD, ∠A + ∠D = 90°. Prove that AC^2 + BD^2 = AD^2 + BC^2 ∠A + ∠D = 90°. Prove that AC^2 + BD^2 = AD^2 + BC^2 12. In a quadrilateral ABCD July 5, 2021 Category: Chapter 6 - Triangles , Maths , NCERT Class 10 ,
11. In ∆ PQR, PD ⊥ QR such that D lies on QR . If PQ = a, PR = b, QD = c and DR = d, prove that (a + b) (a – b) = (c + d) (c – d).
05
Jul
11. In ∆ PQR, PD ⊥ QR such that D lies on QR . If PQ = a, PR = b, QD = c and DR = d, prove that (a + b) (a – b) = (c + d) (c – d). 11. In ∆ PQR PD ⊥ QR such that D lies on [...]
10. In Fig. 6.19, PQR is a right triangle right angled at Q and QS ⊥ PR . If PQ = 6 cm and PS = 4 cm, find QS, RS and QR.
05
Jul
10. In Fig. 6.19, PQR is a right triangle right angled at Q and QS ⊥ PR . If PQ = 6 cm and PS = 4 cm, find QS, RS and QR. 10. In Fig. 6.19 find QS PQR is a right triangle right angled at Q and QS ⊥ PR . If PQ [...]
9. In Fig. 6.18, ABC is a triangle right angled at B and BD ⊥ AC. If AD = 4 cm, and CD = 5 cm, find BD and AB.
05
Jul
9. In Fig. 6.18, ABC is a triangle right angled at B and BD ⊥ AC. If AD = 4 cm, and CD = 5 cm, find BD and AB. 9. In Fig. 6.18 ABC is a triangle right angled at B and BD ⊥ AC. If AD = 4 cm and CD = 5 [...]
8. A street light bulb is fixed on a pole 6 m above the level of the street. If a woman of height 1.5 m casts a shadow of 3m, find how far she is away from the base of the pole.
05
Jul
8. A street light bulb is fixed on a pole 6 m above the level of the street. If a woman of height 1.5 m casts a shadow of 3m, find how far she is away from the base of the pole. 8. A street light bulb is fixed on a pole 6 m above [...]
7. A flag pole 18 m high casts a shadow 9.6 m long. Find the distance of the top of the pole from the far end of the shadow.
05
Jul
7. A flag pole 18 m high casts a shadow 9.6 m long. Find the distance of the top of the pole from the far end of the shadow. 7. A flag pole 18 m high casts a shadow 9.6 m long. Find the distance of the top of the pole from the far end [...]
6. For going to a city B from city A, there is a route via city C such that AC⊥CB, AC = 2 x km and CB = 2 (x + 7) km. It is proposed to construct a 26 km highway which directly connects the two cities A and B. Find how much distance will be saved in reaching city B from city A after the construction of the highway.
05
Jul
6. For going to a city B from city A, there is a route via city C such that AC⊥CB, AC = 2 x km and CB = 2 (x + 7) km. It is proposed to construct a 26 km highway which directly connects the two cities A and B. Find how much distance [...]
5. A 5 m long ladder is placed leaning towards a vertical wall such that it reaches the wall at a point 4 m high. If the foot of the ladder is moved 1.6 m towards the wall, then find the distance by which the top of the ladder would slide upwards on the wall.
05
Jul
5. A 5 m long ladder is placed leaning towards a vertical wall such that it reaches the wall at a point 4 m high. If the foot of the ladder is moved 1.6 m towards the wall, then find the distance by which the top of the ladder would slide upwards on the wall. [...]
4. In Fig 6.17, if PQRS is a parallelogram and AB II PS, then prove that OC II SR.
05
Jul
4. In Fig 6.17, if PQRS is a parallelogram and AB II PS, then prove that OC II SR. 4. In Fig 6.17 if PQRS is a parallelogram and AB II PS then prove that OC II SR. July 5, 2021 Category: Chapter 6 - Triangles , Maths , NCERT Class 10 ,