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Asked: December 4, 2023In: Class 8 Science

Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?

NCERT Solutions for Class 8 Science Chapter 13 Important NCERT Questions 8th Chapter 13 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 2 Description: The laws of reflection dictate that light hitting a surface reflects at ...

bittu45

Asked: November 30, 2023In: Class 9 Science

Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.

NCERT Solutions for Class 9 Science Chapter 11 Sound Page No. 138 Exercise Question 7. 9th Science Chapter 11 Sound NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: Sound waves in air result from vibrations, forming compressions and ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

Two circles intersect at two points B and C. Through B, two line segments ABD and PBQ are drawn to intersect the circles at A, D and P, Q respectively (see Fig. 9.27). Prove that ∠ACP =∠QCD.

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.3 Question 9. NCERT Questions Exercises 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: Two intersecting circles create points where their circumferences meet. ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

In Fig.9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that ∠ BEC = 130°and ∠ ECD = 20°. Find ∠ BAC.

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.3 Question 5. NCERT Questions Exercises 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: Intersecting lines within a circle involve chords, secants, and ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

In Fig.9.25, ∠ABC = 69°, ∠ACB = 31°, find ∠ BDC.

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.3 Question 4. NCERT Questions Exercises 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: Angles within a circle take diverse forms. Central angles, ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

In Fig.9.24, ∠PQR = 100°, where P,Q and R are points on a circle with centre O. Find ∠ OPR

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.3 Question 3. NCERT Questions Exercises 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: In a circle, various angles emerge, such as central ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

In Fig. 9.23, A,B and C are three points on a circle with centre O such that ∠ BOC = 30° and ∠ AOB = 60°. If D is a point on the circle other than the arc ABC, find ∠ADC.

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.3 Question 1. NCERT Questions Exercises 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: An arc in a circle is a curved section ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

If a line intersects two concentric circles (circles with the same centre) with centre O at A, B, C and D, prove that AB = CD (see Fig. 9.12)

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.2 Question 4. NCERT Question Exercises 9.2 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: Concentric circles share a common center and differ ...

bittu45

Asked: November 24, 2023In: Class 9 Maths

Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal.

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.1 Question 2. NCERT Questions Exercises 9th Maths Chapter 9 Circles NCERT Academic Session 2023-2024 CBSE Board and Others state Board Description: – A central angle is formed by extending the endpoints ...

bittu45

Asked: November 24, 2023In: Class 9 Science

Which type of cell division is required for growth and repair of body and which type is involved in formation of gametes?

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life NCERT Books for Session 2023-2024 CBSE Board and UP Board Exercises Questions Page No-59 Questions No- 10

bittu45

Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?

Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. Find the ratio of times taken by the sound wave in air and in aluminium to reach the second child.

Two circles intersect at two points B and C. Through B, two line segments ABD and PBQ are drawn to intersect the circles at A, D and P, Q respectively (see Fig. 9.27). Prove that ∠ACP =∠QCD.

In Fig.9.26, A, B, C and D are four points on a circle. AC and BD intersect at a point E such that ∠ BEC = 130°and ∠ ECD = 20°. Find ∠ BAC.

In Fig.9.25, ∠ABC = 69°, ∠ACB = 31°, find ∠ BDC.

In Fig.9.24, ∠PQR = 100°, where P,Q and R are points on a circle with centre O. Find ∠ OPR

In Fig. 9.23, A,B and C are three points on a circle with centre O such that ∠ BOC = 30° and ∠ AOB = 60°. If D is a point on the circle other than the arc ABC, find ∠ADC.

If a line intersects two concentric circles (circles with the same centre) with centre O at A, B, C and D, prove that AB = CD (see Fig. 9.12)

Prove that if chords of congruent circles subtend equal angles at their centres, then the chords are equal.

Which type of cell division is required for growth and repair of body and which type is involved in formation of gametes?

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