Answer:
Explanation:
A cyclic quadrilateral is a quadrilateral that can be inscribed in a circle, meaning that all four vertices of the quadrilateral lie on the same circle. Cyclic quadrilaterals have a number of properties that are not shared by other quadrilaterals.
Some of the properties of cyclic quadrilaterals include:
- The sum of the opposite angles of a cyclic quadrilateral is always 180 degrees.
- The diagonals of a cyclic quadrilateral bisect each other at right angles.
- The product of the diagonals of a cyclic quadrilateral is equal to the sum of the products of the opposite sides.
- The area of a cyclic quadrilateral can be found using Brahmagupta's formula.
In this case:
We use the property:
The sum of the opposite angles of a cyclic quadrilateral is always 180 degrees.
So,

Solving like terms


Subtracting both sides by 30.


Dividing both sides by 3, we get


Now,
m ∡ ESH =

m ∡ HRE =

Therefore,