19.
Without measuring sketch each angle, then measure for accuracy. Each angle is half of 90 or 45 150 = 90+60 150 = 90+30+30
20.
Draw a line, . Choose a point O between A and B. Use a protractor to investigate the following questions. Q23. In a plane represented by your paper, how many lines can you draw through O that will form a 30 0 angle with ? A O B 2
21.
Draw a line, . Choose a point O between A and B. Use a protractor to investigate the following questions. Q24. In a plane represented by your paper, how many lines can you draw through O that will form a 90 0 angle with ? A O B 1
22.
Q25 Using a ruler, draw a large triangle. Then use a protractor to find the approximate measure of each angle and compute the sum of the three measures of each angle. Repeat the exercise. Do you get the same result? Sum = 180 0 Sum = 180 0 Yes
23.
Q26 Find the measures of angle 2, 3, & 4 when the measure of angle 1 = 90. Q27 Find the measures of angle 2, 3, & 4 when the measure of angle 1 = t. Note that adjacent angles add up to 180 0 .
24.
Q28 A careless person wrote, using the figure shown, What part of the angle addition postulate did that person overlook? B must be in the interior of
25.
Find the value of x. 3 2 1 6X 90 - X First label the diagram to visualize the situation. Second, find an equation using x.
26.
Find the value of x. 3 2 1 First label the diagram to visualize the situation. Second, find an equation using x. 6x + 7 7x +3 Note that the drawing needs to be done again for each problem!
27.
Find the value of x. 3 2 1 First label the diagram to visualize the situation. Second, find an equation using x. 3x + 6 5x - 12 12 12 -3x -3x ___ ____ 2 2 For most students, the red steps should be mental steps. Note that the drawing needs to be done again for each problem!
28.
Find the value of x. 3 2 1 First label the diagram to visualize the situation. Second, find an equation using x. x x 4x Note that the drawing needs to be done again for each problem!
29.
Find the value of x. 3 2 1 First label the diagram to visualize the situation. Second, find an equation using x. 2x - 8 2x - 8 116 Note that the drawing needs to be done again for each problem!
30.
Find the value of x. 3 2 1 First label the diagram to visualize the situation. Second, find an equation using x. X + 12 X + 12 6x -20
Be the first to comment