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January 25, 2015

January 25, 2015

Posted by **karrie** on Thursday, January 5, 2012 at 12:03pm.

Complete the proof below by choosing the reason for line number 2 and line number 6.

Reason

Statement

1. QRST is a parallelogram.

Given

2. QRST is a rectangle

3. is a right angle

Definition of a right angle.

4.

Definition of perpendicular.

5. QRST is a rhombus

If the diagonals of a parallelogram are perpendicular, then the parallelogram is a rhombus.

6. QRST is a square

(Points : 2)

If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle; If the diagonals bisect the opposite angles then the parallelogram is a square.

A rectangle has 4 right angles; A square has 4 right angles.

If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle; If the diagonals of a parallelogram are perpendicular then it is a square.

If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle; If a quadrilateral is both a rectangle and a rhombus, then it is a square.

2. Determine whether parallelogram JKLM with vertices J(-1, 1), K(4, 1), L(4, 6) and M(-1, 6) is a rhombus, square, rectangle or all three. (Points : 2)

rhombus

square

rectangle

rhombus, square and rectangle

3. Quadrilateral ABCD with vertices A(4, 3), B(4, -2), C(-4, -2) and D(-4, 3) is a rectangle, find the length of the diagonals. (Points : 2)

5

8

4. Quadrilateral QRST is a rectangle. RT = 5x + 1 and QS = 6x – 3. Find QS.

(Points : 2)

8

21

42

4

5. In rhombus ABCD, the measure of angle ABE equals 38o, find the measure of angle BAE.(Points : 2)

76°

104°

90°

52°

6. Determine whether parallelogram JKLM with vertices J(-7, -2), K(0, 4), L(9, 2) and M(2, -4) is a rhombus, square, rectangle or all three. (Points : 2)

rhombus

square

rectangle

rhombus, square and rectangle

7. The area of the rectangle is 6675 in2, find the value of x.

(Points : 2)

6586 in

89 in

44.5 in

75 in

8. The sides of square ABCD are extended by the sides of equal length to form square MWTH. If MA = 6 and the area of ABCD is 144 cm2, find the area of MWTH.

(Points : 2)

360 cm2

180 cm2

129600 cm2

288 cm2

9. Find the perimeter and area of rectangle ABCD.

(Points : 2)

P = 75 in; A = 406.25 in2

P = 42.5 in; A = 375 in2

P = 85 in; A = 375 in2

P = 90 in; A = 406.25 in2

10. If the perimeter of a square is 64 cm, find the area. (Points : 2)

32 cm2

48 cm2

64 cm2

256 cm2

- geometry -
**Reiny**, Thursday, January 5, 2012 at 2:47pmNice assignment you have there.

You don't actually expect one of us to do it for you, do you?

Tell you what, you post your choices of answer and somebody will tell you if you are correct or not.

- geometry -
**elzabeth**, Thursday, June 28, 2012 at 12:36pm#5 and 6 is a and d

- geometry -
**Anonymous**, Friday, August 15, 2014 at 11:26pm8. 360cm^2

7. 75in

5. 52 degrees

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