On a piece of paper, use a protractor to construct right triangle abc with ab=3 in. , m∠a=90° , and m∠b=45° .

what statement is true about the triangle?

a ac=3 in.

b bc=6 in.

c bc=3 in.

d ac=6 in.

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units