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Bell Work

V. T. Y. X. U. W. Bell Work. Given the coordinates of one endpoint of AB and its midpoint M, find the coordinates of the other endpoint. 1. A(0, 9); M(2, 5) 2. B(-5, 1); M(1, -1)

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Bell Work

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  1. V T Y X U W Bell Work Given the coordinates of one endpoint of AB and its midpoint M, find the coordinates of the other endpoint. 1. A(0, 9); M(2, 5) 2. B(-5, 1); M(1, -1) In the figure at the right, WY bisects UV at Y and UY bisects TW at X. For each situation, find the value of x and the measure of the indicated segment. 3. UY = 4x – 3 and YV = x, find UV 4. UV = x + 6 and UY = x – 1, find YV

  2. Go over Rest of HW

  3. Vocabulary • Go through Pg. 44 – 48 and define the following terms: • Angle • Ray • Opposite rays • Sides • Vertex • Interior • Exterior • Degrees • Measure • Right Angle • Obtuse Angle • Acute Angle • Congruent Angles • Angle bisector

  4. What is an angle? • An angle is defined in terms of the two rays that form the angle. • A ray extends indefinitely in one direction. • Opposite rays make a line. • An angle is a figure formed by two noncollinear rays with a common endpoint.

  5. Parts of the angle • The two rays of the angle are called the sides. • The common endpoint of the angle is called the vertex. Interior exterior

  6. Measuring Angles • Angles are measured in units called degrees. • They can be measured by using a protractor.

  7. Angle Addition Postulate • If R is in the interior of <PQS, then m<PQR + m<RQS = m<PQS. If m<PQR + m<RQS = m<PQS, then R is in the interior of <PQS.

  8. Classifying Angles • A right angle measures 90 degrees. • An obtuse angle measures greater than 90 degrees. • An acute angle measures less than 90 degrees. • Congruent angles have the same measure.

  9. Angle Bisector • An angle bisector divides an angle in two congruent angles.

  10. Check Your Understanding • Pg. 49 # 3 – 16

  11. Homework • Pg. 50 # 17 – 39

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