A.8CM and 14CM B. 10CM and 14cm c. 18cm and 20CM D. 10CM and 34cm.
Given that the diagonal lengths of parallelogram are acm and bcm, and the length of one side is 6cm, then A and B may be in the following groups: A:4cm and 8 cm B: 2 cm and 6cm C: 10cm and 12cm D: 12cm and 26cm. Given that one side of a parallelogram is 8, which of the following groups can be used as the length of its two diagonals respectively?
A.6, 8b.6, 10c.4,16d.2,20 If one side of the parallelogram is 14, then you can choose its diagonal:
A.8cm16cm B.16cm C.12cm16cm d.20cm 22cm In the parallelogram ABCD, diagonal AC and BD intersect at point O, and e and f are two points on diagonal AC. When e and f meet any of the following conditions,
A. OE = of b.de = BF C. ∠ ade = ∠ CBF D. ∠ Abe = ∠ CDF is () A. The lengths of two adjacent sides are 3 and 5 respectively, and the length of a diagonal is 9; B. The lengths of two groups of opposite sides are 3 and 5 respectively; C. The length of one side is 7, and the lengths of two diagonal lines are 6 and 8 respectively; D. The length of one side is 7, and the lengths of two diagonal lines are 6 and 5 respectively; The four sides of a quadrilateral are A, B, C, D, where A and C are opposite sides, satisfying the requirement of A? 0? 5+b？ 0? 5+c？ 0? 5+d？ 0? 5=2ab+2cd, then this quadrilateral must be ().
A. Two groups of quadrangles with equal angles respectively
B. parallelogram
C. Quadrilateral with mutually perpendicular diagonals
D. Quadrilateral ABCD with equal diagonals in the trapezoid, AD//BE, AD=2, BC=8, AC=6, BD=8, then the area of the trapezoid is ().
Answer. 24
B. 20
c。 16
d。 12
If one side of a parallelogram is 5, then the length of the two diagonals of this parallelogram can be ().
A2 and 3
B.3 and 4
C.4 and 5
D.5 and 6 1, and the sum of the outer angles of a polygon is half of the sum of the inner angles, then it is a polygon ().
a7 b . 6 c . 5d . 4
2. The obtuse angle between the two diagonal lines of a rectangle is 120, so the ratio of the short side to the long side of the rectangle is ().
A.1:2 b. Root number 3:1c. Root number 3: 3 D. 1: 3.
3. What is wrong in the following statement is ().
A set of parallelograms with equal adjacent angles is a rectangle.
B. A quadrilateral with four equal angles is a rectangle.
C. A parallelogram whose diagonal lines are bisected and equal is a rectangle.
A set of parallelograms with equal diagonal angles is a rectangle.
4. In the following statement, the number of errors is ().
(1) the line segment is an axisymmetric figure and a centrally symmetric figure;
② The angle is an axisymmetric figure; ③ The equilateral triangle is a central symmetrical figure;
④ The isosceles triangle is an axisymmetric figure; ⑤ The isosceles triangle is a central symmetrical figure;
⑥ Parallelogram is a figure with central symmetry.
Above a.0b.1c.2d2.
That's enough, choose a few yourself ~ ~