WebSolution Verified by Toppr Correct option is A) ∵OA=OB (radius of circle) ∴∠OAB=∠OBA (angles opposite to equal sites) ∠OBA=40 0 In right angled ΔOAB ∠OAB+∠OBA+∠AOB=180 0 40 0+40 0+∠AOB=180 0 ∠AOB=180 0–80 0 ∠AOB=100 0 We know that ∠ACB= 21∠AOB = 21×100 0=50 0 Thus, (A) is correct. Was this answer helpful? 0 0 Similar questions WebSolution Given: ∠ABC = 20° ... (1) We know, the angle subtended by an arc at the centre is twice the angle subtended by it at the remaining part of the circle. Thus, ∠AOC = 2∠ABC ⇒ …
NCERT Exemplar Class 9 Maths Solutions Chapter 10 Circles
WebMay 16, 2024 · ∠ABC = 20° We know that angle subtended by an arc at the center of circle in double the angle subtended at remaining part. ∠AOC = 2∠ABC. ⇒ ∠AOC = 2 × 20° ⇒ ∠AOC … WebSolution: We know that Angle at the centre of the circle is twice the angle at the circumference subtended by the same arc. ∠AOC = 2 ∠ABC It is given that ∠ABC = 20º … pine village indiana county
In Fig.10.4, if ∠ABC = 20º, then ∠AOC is equal to: (A
WebOct 19, 2024 · Let us consider the full triangle as shown in the above figure. Calculation: Let us consider the Δ AOC, Let ∠OAC = ∠OCA = x° As sum of all angles of a triangle = 180° ⇒ ∠AOC + x° + x° = 180° ⇒ ∠AOC = 180° - 2x° _______ ( 2 ) Now, in Δ BAC also ⇒ ∠ABC + ∠BAC + ∠BCA = 180° ∠ABC + 30° + x° + 50° + x° = 180° ∠ABC + 80° + 2x° = 180° WebApr 5, 2024 · In the figure given below, ABC is right angled at B. Which of the following is true ? 1 नीचे दी आकृत्ति में, ABC में कोण B समकोण है। निम्नलिखित में से कौनसा सत्य है ? (A) sinC =725 (B) sinC =257 (C) sinC=2524 (D) sinC=247 10. If sin ... WebMay 25, 2024 · ∠AOC + ∠OAC + ∠OCA = 180° ⇒ ∠AOC + 45o = 180° ⇒ ∠AOC = 180° – 45° = 135°. Question 3. In the given figure, prove that m n. Solution: In ∆BCD, ext. ∠BDM = ∠C + ∠B = 38° + 25° = 63° Now, ∠LAD = ∠MDB = 63° But, these are corresponding angles. Hence, m n Question 4. In the given figure, two straight lines PQ and RS intersect each other at O. top oil for scalp