Given: 


Find:  a)


b)


c)


d)


(HINT: Dra

a)
To calculate:
The
Given:
In a circle Q,
Theorem used:
The measure of an inscribed angle of a circle is onehalf the measure of its intercepted arc.
An angle inscribed in a semicircle is a right angle.
Calculation:
From the figure we see that
We know that the angle inscribed in a semicircle is a right angle. Therefore
Given that
In a right triangle STR, the hypotenuse is twice as longer than the shorter leg.
Hence the angles in right triangle STR are
b)
To calculate:
The
c)
To calculate:
The
d)
To calculate:
The
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