Question

In figure AOC is a diameter of the circle. If ab=7cm,BC=6cm and cd=2cm, find the perimeter of cyclic quadrilateral ABCd

Answer 1

state the figure then I will answer

Answer 2

Step-by-step explanation:

Draw the figure in a correct way so that you know what the cyclic quadrilateral looks like

Now consider triangle ADC where angle D is a right angle because any angle inscribed in a semi circle is a right angle

so now triangle ADC is a right angled triangle

then according to hypotenuse theorem find length AD

which is √45

now add up all the sides of ABCD

ultimately your answer comes to 15 + √45