Exterior Angle Theorem
The exterior angle theorem says that an exterior angle of a triangle equals the sum of the two interior angles not adjacent to it. It follows directly from the fact that a triangle totals 180 degrees and a straight line does too. (∠x) is the exterior angle. (∠x + 92 = 180º) (linear pair of […]
How to Find Slope From a Graph?
Slope measures vertical change divided by horizontal change between two points. A vertical line has undefined slope because its horizontal change is zero. Quick method: Choose two clear points on the straight line. Read the units on each axis, find the vertical change (rise) and horizontal change (run), then divide rise by run. For (1, […]
