PLEASE HELP. I will do anything, please. May someone explain what I have to do? Explain with steps please. I’m having trouble comprehending this.

To prove : ΔDEC ~ ΔDAB

angle DEC = angle DAB ( Corresponding angles when Line EC || Line AB and EC being the transversal)

angle EDC = angle ADB( Common angle D)

therefore, ΔDEC ~ ΔDAB by A - A test of similarity.

im alright what do you need

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.