Θ =

= 10
a = 18cos36
b = 18sin36
Area = 10×

×18sin36×18cos36 = 770.36
By dividing both numbers by 25, it will be 1/4
Answer:
x=18
Step-by-step explanation:
We'll assume that the shorter sides are AB and CD. Then 7x-6=5x+30. You add 6 to both sides. 7x=5x+36. Isolate x. 2x=36. Divide, and x=18.