What was johannes gutenburg raised to do

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

8. is a technique that uses the images from several telescopes to produce a single image. a. reflection b. interferometry c. radiation d. refraction