6.6.2 Angles and Tangents of Circles, PT3 Practice


6.6.2 Angles and Tangents of Circles, PT3 Practice

Question 4:
Diagram below shows a circle with centre O. POR is a straight line.

Find the value of x and of y.

Solution:
x = 40 × 2 = 80 y = 180 80 2 = 50


Question 5:
Diagram below shows a semicircle ABCD with centre O.

It is given that AB = CD.
Find the value of y.

Solution:

y+ 32o + 32o + 90o = 180o
y= 180o – 154o
y= 26o
= 26


Question 6:
In diagram below, ABC and DEF are straight lines.

Find the value of x and of y.

Solution:
x+38=93 x=9338 x=55 DBG= 38 o  ( GB=GD )     y o =DBG y=38

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