Angles and Parallel Lines - Problems on Triangles - Case Studies

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Q. If two angles are supplementary and one angle measures 120°, what is the measure of the other angle?
  • A. 60°
  • B. 90°
  • C. 120°
  • D. 180°
Q. In a coordinate plane, what is the slope of the line passing through the points (2, 3) and (4, 7)?
  • A. 2
  • B. 1
  • C. 0.5
  • D. 3
Q. In triangle DEF, if angle D = 30° and angle E = 45°, what is the measure of angle F?
  • A. 105°
  • B. 90°
  • C. 75°
  • D. 60°
Q. In triangle DEF, if angle D = 45° and angle E = 45°, what is the type of triangle?
  • A. Scalene
  • B. Isosceles
  • C. Equilateral
  • D. Right
Q. In triangle DEF, if angle D = 45° and angle E = 45°, what type of triangle is it?
  • A. Scalene
  • B. Isosceles
  • C. Equilateral
  • D. Right
Q. In triangle GHI, if angle G = 30° and angle H = 45°, what is the measure of angle I?
  • A. 105°
  • B. 90°
  • C. 75°
  • D. 60°
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