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Which type of angle do construction workers use when building to make sure that the walls and floors of a building are perpendicular?

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A Right Angle

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yes

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I have 26 questions on my math homework! but i need help with these! please help me i need it finished now!

2. Which type of angle do construction workers use when building to make sure that the walls and floors of a building are perpendicular? (1 point)
acute
obtuse
right
straight
3. Which of the following is the measure of an obtuse angle?

(1 point)
40°
100°
90°
180°
4. Which of the following is the measure of an acute angle? (1 point)
180°
135°
90°
28°

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3 180

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2.Obtuse
3.100 degree
4.28 degree

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2.right

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I took this test and here are the right answers the ones above are wrong
1.obtuse
2.right
3.100 degrees
4.28 degrees
5.TRS

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1.) B
2.) C
3.) B
4.) D
5.) A
100%

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I can state the answers from the two people above are correct. I got 100%,thank

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THOSE ARE CORRECT ^^^