Question

before you measure an angle, what does the origin of the protractor need to be lined up with?
end
point
ray
vertex
question 8(multiple choice worth 2 points)
(14.02 mc)
select the statement that correctly describes acute angles and obtuse angles.
an acute angle is equal to 90°, and an obtuse angle is greater than 90°.
an acute angle is less than 90°, and an obtuse angle is equal to 90°.
an obtuse angle is greater than 90°, and an acute angle is less than 90°.
an obtuse angle is equal to 90°, and an acute angle is less than 90°.

Explanation:

When using a protractor to measure an angle, the origin of the protractor must be lined up with the vertex of the angle. An acute angle is defined as an angle less than 90°, and an obtuse angle is defined as an angle greater than 90° and less than 180°.

Answer:

First question: D. Vertex
Second question: C. An obtuse angle is greater than 90°, and an acute angle is less than 90°.