A challenge to all math experts... Follow me if you love such challenging questions as I keep on asking such questions to check the mindsets of the mathematicians roaming in
Please don't answer unnecessarily as your bad effort to gain points will be reported by me, first of all try in paper then only answer as your wrong answer reduces the chance for other mathematicians

75

Step-by-step explanation:

Refer to attachment

As the first step extending the segment BC until intersection with AD.

Since ∠A + ∠B = 90° we get right triangle by extending CB

Naming the segments a, b, c, d as pictured

The are of (ABCD) is equal to sum of areas of two right triangles:

Substitute d with a-c as a = c+d, then:

Applying Pythagorean to small triangle:

Applying Pythagorean to bigger triangle:

Subtracting equations we got:

This gives us the 4 times of the area which is 1/2(ab + ac), so the area is

2

step-by-step explanation:

srry idk

step-by-step explanation: