Can someone please help me coz i really need this :(

i need serious answer :(​

1. DB = 10 as diagonals of isosceles trapezoid are congruent

2. ∠DAB and ∠BCD are supplementary angles

3. ∠BCD is congruent with ∠ADC as trapezoid is isosceles

4. AB = 15, DC = 25,

5. m∠ADC = 2x - 10, m∠ABC = 3x + 40

These are supplementary, find x first:

[i] AC = 10, so DB = 10.

REASON:

Diagonal of isosceles trapezoid are equal.

[ii] m∠DAB + m∠BCD = 180°

REASON:

If a quadrilateral is an isosceles trapezoid, the opposite angles are supplementary.

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)