Aridge of land that separates one watershed from another is

In the diagram below, ab and bc are tangent to o. what is the measure of

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine