① Ray ② Line segment ③ Line

2. Draw a ray to divide a right angle into two angles, one is an acute angle and the other is ().

① acute angle ② right angle ③ obtuse angle

3. If you draw two straight lines on a piece of paper, and both straight lines intersect the third straight line at right angles, then these two straight lines are ().

① perpendicular to each other ② parallel to each other ③ neither parallel nor perpendicular.

4. Parallelogram () is equal.

① Four corners ② Four sides ③ Opposite sides

5. Rectangles are special ().

① Square ② Parallelogram ③ Trapezoid

6. Draw a () from a point on the upper bottom of the trapezoid to the lower bottom, and the () between this point and the vertical foot is called the height of the trapezoid.

① Straight line ② Ray ③ Line segment ④ Vertical line

Third, true and false. (Mark "√" in the right picture and "×" in the wrong question)

1. Two disjoint straight lines must be parallel to each other. ()

2. The longer the side of the angle is drawn, the bigger the angle is. ()

3. A figure composed of three line segments must be a triangle. ()

4. Rectangular, square, parallelogram and trapezoid are all quadrilaterals. ()

5. Two groups of opposite sides of parallelogram are parallel and equal respectively. ()

6. A triangle with an acute angle is an acute triangle. ()

7. An isosceles triangle must have two equal angles. ()

8. Both triangles and parallelograms have only one height. ()

Fourth, drawing questions.

1. Make an angle of 75 degrees with a protractor and ruler.

2. Draw a vertical line with a known straight line through point A.3.. Draw a parallel line with a known straight line through point B.

4. Write the graphic name, from point A to the opposite height.

Measure the degrees of the three angles in each triangle and point out what triangles they are.

6. In the picture below, what cannot be spelled with two identical triangles is ().

Reference answer

Fill in the blanks.

1. line segment, ray 2. Straight 3.2

Second, multiple choice questions.

1.① 2.③ 3.② 4.③ 5.② 6.④③

Third, the question of judgment.

1.× 2.× 3.× 4.√ 5.√ 6.× 7.√ 8.×

Fourth, drawing questions.

1.

2.3.

4.

Triangular parallelogram trapezoid

Verbs (abbreviation for verb) acute triangle, right triangle and obtuse triangle.

6.⑤

Unit test 2

Fill in the blanks.

1. Right angle equals () right angle. Half of the fillet is a () angle.

2. The sum of the three internal angles of any triangle is () degrees.

3. You can draw a () straight line through one point and a () straight line through two points.

4. Divide the semicircle into 180 parts, and the right angle of each part is called ().

5. When two straight lines intersect into (), these two straight lines are called mutual (), and their intersection point is called ().

6.∠ 1+ 1 15 forms a straight angle, ∠ 1 = ().

7. All three internal angles of a regular triangle are () degrees.

8. Both obtuse triangles and right triangles have () acute angles.

9. The triangle has the characteristics of (). The characteristic of parallelogram is (). These characteristics are widely used in practice.

10. When the upper and lower bottoms of the trapezoid are equal, this figure becomes a () shape.

True or false. (tick "√" for the right and "×" for the wrong, ** 10)

1. The right angle is a straight line. ()

2. The length of a straight line is10m. ()

3. The longer the side of an angle, the bigger the angle. ()

4. Look at an angle of 30 with a magnifying glass of 10 times, and the angle you see is 300. ()

Two disjoint straight lines are called parallel lines. ()

6. Two straight lines are parallel, and they must be equal. ()

7. A triangle whose sum of two internal angles is 90 is a right triangle. ()

8. The two opposite sides of a parallelogram are equal. ()

9. The sum of the internal angles of the trapezoid is 360 degrees. ()

10. The two base angles of the isosceles trapezoid are equal. ()

Third, multiple choice questions. (Fill in the serial number of the correct answer in brackets, ***20 points)

1. You can draw a triangle () at most.

①l ②2 ③3

2. Two straight lines can intersect into four ().

① acute angle ② right angle ③ obtuse angle

3. You can draw a vertical line from one point on one side of the parallelogram to the other.

One article, two articles and countless articles.

4. Among the three internal angles of a triangle, at least ()

① An obtuse angle and a right angle ② Two acute angles ③ An acute angle and a right angle.

5. There are two straight lines parallel to one straight line. These two straight lines ()

① perpendicular to each other ② parallel to each other ③ intersecting.

6. One angle in the isosceles triangle is 50, and the other two internal angles are ().

(1) are 65; ② 50、80； ③ 50 and 80 or both are 65.

7. In a right triangle, one acute angle is 60 and the other acute angle is ().

①30 ②45 ③60

8.a, B and C are on the same plane, but not on the same straight line. You can draw a () line segment after three o'clock.

1 1 22 33 4 countless.

9. In the same plane, draw a parallel line of a known straight line at a point outside the straight line, and you can draw ().

1 1 22 33 4 countless.

10. In the figure below, ∠ 1 is ().

①l40 ② 145 ③ 105

Draw a picture. (6 points for each small question, * * * 24 points)

1. Draw parallel lines and vertical lines of known straight lines through point p, respectively.

2. As shown in the upper right figure, draw the vertical line of AB and the parallel line of AC through point M respectively.

Draw a rectangle with a length of 6 cm and a width of 2 cm.

4. Draw a triangle with sides of 4cm and 5cm and an included angle of 30. What triangle is it?

5. calculation questions. (1~ 6 points for 4 questions and 7 points for 5 questions)

1. As shown in the figure, it is known that ∠AOC and ∠BOD are right angles, and ∠ 1 = 30. Find the degree of ∠2

2. The top angle of an isosceles triangle is 66, and what is its bottom angle?

3. Angle A is three times that of Angle B, and the sum of Angle A and Angle B is 136. What's the angle b?

4.∠ 1, ∠2 and ∠3 are three internal angles of a triangle respectively. It is known that ∠3 is less than a fillet 300, and the degree of ∠3 is three times that of ∠2. What is the degree of ∠ 1?

5. As shown in the figure, it is known that 1 = 75, ∠ 2 = 20, ∠ 3 = 46, and ∠ 5 =?

Reference answer

Fill in the blanks.

1.2, straight 2. 180 3. Countless, an angle of 4.15. Right angle, vertical, vertical foot.

6.65 7.60 8. Two 9s. Stable and easy to deform 10. parallelogram

Second, the problem of judgment.

1.× 2.× 3.× 4.× 5.× 6.× 7.√ 8.√ 9.√ 10.√

Third, multiple choice questions.

1.③ 2.② 3.③ 4.② 5.② 6.③ 7.① 8.③ 9.① 10.③

5. calculation questions.

1.30 2.57 3.34 4. 100 5.39