Determine whether each set of side lengths could be the sides of a right triangle.

10.5 cm, 20.8 cm, 23.3 cm

6 cm, 22.9 cm, 20.1 cm

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Which ordered pair is a solution of the equation? 2x+3y=10