18. In the figure, ABCD is rectangle, A CEF is equilateral and BE = 3 cm. (a) Find the length of AC. (b) Find the angles x, y and z.
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It is given that, ABCD is a rectangle
∴∠ADC=90
o
In △ADC, we have
∠DAC+∠ADC+∠DCA=180
o
(Angle sum property)
⇒65
o
+90
o
+x=180
o
⇒x=25
o
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