Question
AB is the diameter of a circle centered at O. A tangent
drawn at point C intersects the extension of AB at point D. If ∠CAB = 38°, find the value of ∠CDB.Solution
ATQ,
Angle made by the diameter of a circle on the arc of the circle is 90°, i.e. ∠ACB = 90°.
Sum of all angles in a triangle is 180°.
So, ∠CAB + ∠CBA + ∠ACB = 180°
Or, 38° + ∠CBA + 90° = 180°
Or, ∠CBA = 180° - 128°
Or, ∠CBA = 52°
Now, ∠CBA + ∠CDB = 180°
(Linear pair of angles)
So, ∠CDB = 180 - 52 = 128°
In a single-action disc harrow, how do the gangs throw the soil?
The fundamental objective extension education is of
What is the primary purpose of seed storage?
World Forestry day is celebrated on:
Mango is a sweet and juicy fruit with a distinctive flavor and aroma, and is rich in vitamins, minerals, and antioxidants. The temperature at which chi...
_____ is used for seeding warm clouds.
In ammonium sulphate nitrate fertilizer, the ratio of ammonical-N and nitrate-N is:
Which of the following features is NOT a part of the recently launched Krishi-Decision Support System (Krishi-DSS)?
The National Development council gets its administrative support from:
The biological control agent used for management of rice leaf folder is
Relevant for Exams:
