Unit 1 Review (Geometry)

Front

What is the formula to find the midpoint between two points (x1, y1) and (x2, y2)?

Back

Midpoint = ((x1 + x2)/2, (y1 + y2)/2)

Front

If m∠1 = 2x + 9 and m∠2 = 3x - 144, how do you find m∠3 if m∠1 + m∠2 + m∠3 = 180°?

Back

Set up the equation: (2x + 9) + (3x - 144) + m∠3 = 180° and solve for m∠3.

Front

What is the definition of a midpoint in geometry?

Back

A midpoint is a point that divides a line segment into two equal parts.

Front

If Q is the midpoint of PR and PQ = 6x - 7, QR = 5x + 1, how do you find the length of PR?

Back

Set PQ = QR, solve for x, then use PQ + QR to find PR.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is always 180°.

Front

How do you calculate the length of a line segment given two endpoints (x1, y1) and (x2, y2)?

Back

Length = √((x2 - x1)² + (y2 - y1)²)