Answer:
31.41
Step-by-step explanation:
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If two chords of a circle are congruent, then their intercepted arcs are congruent
7x-39 = 87
7x = 87 + 39
7x = 126
x = 126/7
x = 18
Ray df or ray fd because both of these letters are consecutive in both of the angles.
The area of a triangle with base 'b' and height 'h' is given by the formula:

It is given that the area of a triangle is
.
It is given that the base of the triangle is 5 times the height.
So, 
We have to determine the height of the triangle.
Since, 






So, 
So, h = 24 cm
Therefore, the height of the triangle is 24 cm.
Option 2 is the correct answer.
The answer you are looking for is 2 4/5. Hope this helps.