Answer:
Regular polygons have all their angle the same. 90 degree angles can only make a square.
Explanation:
To be regular, all angles have to be congruent. That would be 7 right angles The sum of the angles for an n-sided polygon is (n-2)180 or when n=7 that is 5(180) which is 10(90). and you have only 7 times 90 if they were all 90.
<span>Without the protection of the stratospheric zone, the UV rays can cause skin damage over a prolonged duration in the sun. If this happens the risk for skin cancer is increased. It's best not to be out in the sun for any long period of time between the hours of 10:00 a.m. to 2;00 p.m. when the ultraviolet rays of the sun are strongest.</span>
Not quite sure what you're asking, but erosion and deposition do create land forms. For example: erosion along the coastline may result in the formations of arches, stacks, stumps, wave cut platforms, caves, etc. Deposition, different amount of it and in certain areas, under the influence of either destructive or constructive waves, will form beaches - ones with a lot of beach, through a lot of deposition, or slopes beaches where destructive waves have crashed upon the beach. Hope this is what you're looking for.
Islam was born in Mecca which is on the Arabian Peninsula