9.74 x 10212.1 x 1022 help me please with this? thanks to whoever does

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

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?

Y< 2x-3 y? mx+3 which value of m and which symbol result in the system of inequalities shown above having no solution? a) m=-2; > b) m=-1/2; < c) m=2; > d) m=2;