Write a letter to your Class Teacher requesting her/him for one day leave.
Answers
Answer:
DATE ,
PLACE .
To
class teacher,
CLASS-SECTION,
school name.
respected sir/madam,
I am NAME of CLASS and SECTION in your reputed school.from last day i was suffering with fever so,please grand me a leave for only one day.i.e, on DATE.
i request you to grand me a leave on above mentioned day.
thanking you,
Yours sincerly,
NAME.
=====================================
Good morning
Answer:
Given, AB is a chord of the circle.
AOC is the diameter of the circle.
Also, ∠ACB = 50°
AT is the tangent of the circle.
We have to find the measure of the angle BAT.
We know that the angle in a semicircle is a right angle.
So, ∠CBA = 90°
We know that the sum of all three interior angles of a triangle is always equal to 180°
In triangle AOB,
∠CAB + ∠CBA + ∠ACB = 180°
∠CAB + 90° + 50° = 180°
∠CAB + 140° = 180°
∠CAB = 180° - 140°
∠CAB = 40° ------------------- (1)
We know that radius of a circle is perpendicular to the tangent at the point of contact.
From the figure,
OA ⟂ OT
So, ∠CAB + ∠BAT = 90°
Substitute (1) in the above expression,
40° + ∠BAT = 90°
∠BAT = 90° - 40°
∠BAT = 50°
Therefore, the measure of the angle BAT is 50°
✦ Try This: In the given figure, O is the centre of the circle, BD = OD and CD ⊥ AB. Find ∠CAB.