Are the two spheres congruent?
no, because they have the same diameter length
no, because they have a different radius length
yes, because they appear to look the same size
yes, because they have the same volume

It's B because they have a different radius length.

Just got it!

The answer is B.

Step-by-step explanation:

B. No, because they have a different radius length.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true