Use special right triangles to solve for the exact value of x.

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

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

An isosceles trapezoid with a perimeter of 42 inches. each of the congruent non parallel sides is 5 inches long, and the trapezoid is 3 inches tall. how long are the two parallel sides? a. 10 in, 22 in b. 16 in, 16 in c. 10 in, 16 in d. 12 in, 20 in