A line through a triangle’s top vertex is parallel to its opposite side. Explain how that line helps prove that the triangle’s three interior angles add to 180 degrees.
Track the base angles onto the new line.
Question 2 of 2
A checkpoint, not a test
Use both midsegment facts
A segment joins the midpoints of two sides of a triangle. State its direction compared with the third side and explain how to find its length from that side’s length.
