# geometry

posted by .

A parallelogram has sides of length 3 and 5 and a diagonal length 10. is the quadrilateral a rectangle? please explain

• geometry -

No. The corners don't measure 90 degrees. If they were right angles, then the Pythagorean Theorem would show the diagonal measuring about 5.8.

## Similar Questions

The length of a rectangle is 3 cm and the width is 2 cm. find the length of the diagonal. Is there a formula to do this?
2. ### Geometry

The length of a rectangle is 1cm longer than its width. If the diagonal of the rectangle is 4cm, what are the dimensions(the length and the width)of the rectangle?
3. ### geometry theorems

I have six questions which will be on a test two weeks from now, and I do not understand. Help me find out these theorems for the blanks. 1. If one pair of consecutive sides of a parallelogram are congruent, then the parallelogram …
4. ### geometry

If all four sides of a quadrilateral measure the same length, and one coner angle measures 90 degree, what shape can the quadrilateral be A)rhombus B)rectangle C)square D)parallelogram E)all of these
5. ### geometry

Given: QRST is a parallelogram. Prove: QRST is a square. 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 …
6. ### geometry

Find the length of a rectangle if its diagonal is 34 cm long and the angle the diagonal makes with the length is 27° 50'. (answer correct to the nearest centimetr) Thank you so much Could you be so nice and explain me ho I will count …
7. ### MATHS

A diagonal of a rectangle forms an angle of 60 degree with each of the two shorter sides of the rectangle.If the length of a shorter side of the rectangle is 3,what is the length of the diagonal?
8. ### Math - Trigonometry

The diagonal of a rectangle of width 3.8, makes an angle of 32° 15' with each of the longer sides. Find the length of the diagonal, and the length of the rectangle. Im not sure how to picture/draw the shape, which in term will tell …
9. ### Geometry

A parallelogram has sides measuring 7 and 9. Its shorter diagonal has a length of 8. Find the measure of the longer diagonal.
10. ### Geometry

Quadrilateral ABCD is a parallelogram. If adjacent angles are congruent, which statement must be true?

More Similar Questions