Considerando la suma de los ángulos que coinciden en cada vértice, justifica por qué no se puede construir un poliedro en los siguientes casos:
A) con 6 triángulos equiláteros en cada vértice.
B) con 4 cuadros en cada vértice.
C) con 4 pentágonos regulares en cada vértice.
D) con hexágonos regulares o polígonos regulares demás lados.

If kn = 9 cm, mn = 21 cm, rs = 42 cm, and ps = 18 cm, what is the scale factor of figure klmn to figure pqrs?

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?