Find a completely simplified expression for the perimeter (2 ⋅ length + 2 ⋅width) of the blue rectangle:

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

X+y=-4 x-y=2 use elimination with adding and subtraction

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.