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Created by Terri Street Copyright, 2000 1,000,000 500,000 250,000 125,000 64,000 32,000 16,000 8,000 4,000 2,000 1,000 500 300 200 100 Click to return to question, Cont-P to switch to the pen, cross out two incorrect answers, then Cont-A to switch back to pointer. Click to return to the question and poll the class Click on link to Ask Jeeves, or click on this oval to return to question and ask a friend “Two lines in a plane always intersect in exactly one point” Which of the following best describes a counterexample to the assertion above? A. parallel lines B. coplanar lines C. perpendicular lines D. intersecting lines A. Parallel lines Back to Board In the diagram Which of the following conclusions does not have to be true? A. line l is parallel to line m C. are supplementary angles B. D. C. are supplementary angles Back to Board What is the value of x in the triangle shown? A. B. C. D. B. Back to Board A. B. C. D. A. Back to Board A. B. C. D. D. 1,000 answer Back to Board What values of a and b make quadrilateral MNOP a parallelogram? A. B. C. D. C. Back to Board Theorem: A triangle has at most one obtuse angle. Eduardo is proving the theorem above by contradiction. He began by assuming that in, are both obtuse. Which theorem will Eduardo use to reach a contradiction? A. If two angles of a triangle are equal, the sides opposite the angle are equal. C. If two supplementary angles are equal, the angles each measure 90 degrees. B. The sum of the measures of a triangle is 180 degrees. D. The largest angle in a triangle is opposite the longest side. B. The sum of the measures of a triangle is 180 degrees. Back to Board Given: TRAP is an isosceles trapezoid with diagonals . Which of the following must be true? A. B. C. D. C. Back to Board A sewing club is making a quilt consisting of 25 squares with each side of the square measuring 30 centimeters. If the quilt has 5 rows and 5 columns, what is the perimeter of the quilt? A. 900 cm C. 150 cm B. 300 cm D. 600 cm D. 600 cm Back to Board Which of the following facts would be sufficient to prove that triangles ABC and DBE are similar? A. B. C. D. B. Back to Board A. 120 degrees B. 70 degrees C. 60 degrees D. 50 degrees A. 120 degrees Back to Board The rectangle shown has length 20 meters and width 10 meters. If four triangles are removed from the rectangle as shown, what will be the area of the remaining figure? A. 144 sq. meters B. 168 sq. meters C. 184 sq. meters D. 136 sq. meters B. 168 sq. meters Back to Board A. B. C. D. C. Back to Board A. 70 degrees B. 20 degrees C. 40 degrees D. 55 degrees D. 55 degrees Back to Board A. scalene B. right C. equilateral D. isosceles A. scalene Sorry, try again! Thanks for playing!