Answer:
The Undefined term that is used to define an angle is a <u>point.</u>
The answer should be number 4
You use the equation Ax^2 + Bx + C to solve this equation.
The answer is 25.
I hope this helps :D
1-->12, 2*AE = length of the diagonal
3-->10, AC is equal to BD.
2-->
Angles : <CBA, <DBA, <BCD, <BAD, are all 40
Angles: <ADB, <CAD, <ACB, <CBD are all 70
Angles: <ACD, <ABD are 70
Angles: <CDB, CAB are 110.