The two complementary equal angles, the measure of each angle is........

• 180 degrees

• 45 degrees

• 360 degrees

• 90 degrees

• 10 degrees

• 100 degrees

• 180 degrees

• 280 degrees

If a line segment is extended from only one terminal without limit, then it is a ..........

• line segement.

• ray.

• straight line.

• angle.

The two adjacent complementary angles, their outer sides are.......

• perpendicular

• parallel

• collinear

• coincided

The type of angle measure in the photo is .......

• acute

• right

• obtuse

• straight

If the ratio between the measures of two supplementary angles is 4 : 5, then the measure of the greater angle is .......

• 80 degrees

• 90 degrees

• 100 degrees

• 120 degrees

The acute angle supplements the .............. angle.

• right

• acute

• obtuse

• straight

The two vertically opposite angles are supplementary, then the measure of each angle is ..........

• 45 degrees

• 180 degrees

• 90 degrees

• 360 degrees

• 30 degrees

• 60 degrees

• 90 degrees

• 120 degrees

The sum of measures of the accumulative angles at a point is

• 90 degrees

• 4 rights

• 180 degrees

• 270 degrees