Question
Prove that the angle in a segment shorter than a semicircle is greater than a right angle.
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$ii.$ Volume of the cylinder so formed.
$O$ is the circumference of the triangle $ABC$ and $OD$ is perpendicular on $BC$. Prove that $\angle\text{BOD}=\angle\text{A}.$
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The mean of the following data is $20.6$ Find the value of $p$.
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x:
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$10$
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$15$
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$p$
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$25$
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$35$
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f:
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$3$
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$10$
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$25$
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$7$
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$5$
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In figure, Line $l_1$ and $l_2$ intersect at $O$, forming angles as shown in the figure. If $x = 45$, find the value of $y, z$ and $u.$ 
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