The legs of a right triangle are 12 cm and 16 cm. what is the length of the hypotenuse? 15 cm 17 cm 20 cm 28 cm

20 cm

To solve this, use the Pythagorean Theorem, a² + b² = c², where a and b are the legs of the right triangle, and c is the hypotenuse of the right triangle.
**The Pythagorean Theorem only works for right triangles.**

Substitute in the values.
a² +  b² = c²
12² + 16² = c²

Solve for c, the hypotenuse.
12² + 16² = c²               
144 + 256 = c²
400 = c²
c = √400
c = 20

Basic algebra equation. first set up your equation: divide out 9.and now you are left with 2x + 4 = 8.

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b