I was also led to believe those two verses are "scientific proof" kuno that the Bible is divinely inspired and is very much way ahead in science. Until i realized this are merely the interpretation of some christian fundamentalists to suit their agenda and this view is shared only by a small minority of the Judeo-Christian faith. It's kinda weird or impossible for the different major Judeo-Christian religions and denominations to miss out those two verses for almost 2,000 years and then suddenly in the late 20th century some Christian scholars kuno will make an outrageous claim and interpretation.
Isaiah 40:22 "circle of the earth" is more reasonably interpreted as referring to a flat circular earth with the heavens forming a dome above it. Such an interpretation is consistent with other passages of the Bible which refer to a solid firmament (Gen. 1:6-20, 7:11; Ezekiel 1:22-26; Job 9:8, 22:14, etc.). It is also consistent with the cosmology common in neighboring cultures. A "circle" being two-dimensional in form is in contrast with a "sphere" which is the closest shape of the earth.. Religious liberals which comprises majority of the scholars would group Isaiah 40:22 together with Job 22:14 "circle of the heaven" and Proverbs 8:27 "circle of the deep" to refer to the earth having a two dimensional circular form -- in the shape of a flat disk. Historians, archaeologists, mainline and liberal theologians generally believe that the Bible writers simply accepted their contemporary Pagan beliefs of neighboring countries about the shape of the earth, and the layout of the universe. This is how Isaiah viewed the universe:
courtesy: religioustolerance.org
Job 26:7 If you're living in Job's time, you can easily understand why he was able to say that God hangeth the earth on nothing. He could have been observing the heavens and noticed there's nothing visibly tying the earth to the sky. The sun and moon also appear to hang on nothing, and that idea could be extended to the earth. BUT IT DOES
NOT PROVE THE EARTH IS FLOATING IN SPACE. The quote from Job is misleading. Even if the earth "hangeth upon nothing", something that "hangeth" must still hangeth from something. The fact that Job talks about the earth hanging at all is proof of its falsity. Now, if Job said something like "the earth floateth among the emptiness of the void", religionists would have something to talk about.
Here's a surprise. If we check the other verses in the Book of Job, we see that Job seems to say the exact opposite:
“He shakes the earth from its place and makes its pillars tremble.” Job 9:6
Pillars? How can the earth hang on nothing and be placed on pillars?
God also seems to support the idea of a foundation, and answers Job saying:
“Where wast thou when I laid the foundations of the earth? … Whereupon are the foundations thereof fastened?” Job 38:4-6
God tells us what those foundations are in 1 Samuel and Psalms 75:
“The pillars of the earth are the LORD’s, and he hath set the world upon them.” 1 Samuel 2:8
“When the earth and all its people quake, it is I who hold its pillars firm.” Psalm 75:3
This is a clear dilemma to those Christian fundamentalists and those people that share the same idea like you.