Question
If O is circumcentre of acute angled triangle ABC, if
∠ OBC = 300 then ∠BAC = ?Solution
∠ OBC = ∠ OCB= 300 as radius are equal. ∠ OBC+ ∠OCB + ∠BOC =180 0 300 + 300 + ∠BOC =180 0 So, ∠BOC = 120 0 Now, ∠ BOC = 2 ∠ BAC So, ∠BAC = 1/2 of ∠BOC = 1/2 of 120 0 = 600
Find the wrong number in the given number series.
11, 30, 67, 133, 219, 346
- Find the wrong number in the given number series.
12, 16, 25, 50, 99, 200 970, 934, 920, 893, 884, 880
- 80, - 44, - 4, 88, 216, 380
126, 295, 520, 807, 1170, 1611
32, 41, 66, 115, 236, 415
Find the wrong number in the given number series.
30, 26, 24, 18, 14, 10
8, 17, 35, 71, 143, 287
224, 183, 144,115, 86, 63, 44.
Find the wrong no in the given number series.
175, 319, 488, 694, 909, 1165