Which classification best represents a triangle with side length 6 cm, 10 cm, and 12 cm

An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75

What are similarities and differences between refraction, reflection, diffraction and absorption?

What is the speed of an object at a given moment?