The answer is B all angles are right angles.
Hi!to calculate a square root without a calculator is to see if you can get to that whole number by squaring smaller numbers,or multiplying a smaller number by it self.
Answer:
if 1in=15miles
then20.4in=? miles
1in by ? miles and 20.4in by 15miles
1in ? miles= 306in miles
divide both sides by 1in
? miles= 306 miles
therefore 20.4in = 306miles