Trig
posted by Chris .
The diagonals of a parallelogram intersect at a 42◦ angle and have lengths of 12 and 7 cm. Find the lengths of the sides of the parallelogram. (Hint: The diagonals bisect each other.)

if the sides have length a and b,
a^2 = 6^2 + 3.5^2  2(6)(3.5)cos42
b^2 = 6^2 + 3.5^2 + 2(6)(3.5)cos42
Respond to this Question
Similar Questions

Geometry
I had to fill out a chart stating the properties of certine shapes(parallelograms). Some of them i put to many properties please tell me witch ones i have wrong. The properties to select from: 1Opposite sides are parallel (both pair) … 
Geometry
I had to fill out a chart stating the properties of certine shapes(parallelograms). Some of them i put to many properties please tell me witch ones i have wrong. There are wrong properties listed for some shapes because My teacher … 
math
The sides of a parallelogram are 15 ft and 17 ft. One angle is 40° while another angle is 140°. Find the lengths of the diagonals of the parallelogram (to the nearest tenth of a foot) 
math
. Two groups of students are using a dynamic geometry software program to investigate the properties of quadrilaterals. The first group has concluded that the diagonals of a quadrilateral always bisect each other. The second group … 
geometry
find the area of a parallelogram with diagonals of lengths 10 inches and 22 inches that intersect at a 65 degrees angle. 
Geometry
find the area of a parallelogram with diagonals of lengths 10 inches and 22 inches that intersect at a 65 degrees angle 
Pre cal
A parallelogram has sides of lengths 7 and 4, and one angle is 55°. Find the lengths of the diagonals. (Round your answers to two decimal places. Enter your answers as a commaseparated list.) 
Math
The lengths of two sides of a parallelogram are 7.4cm and 9.2cm and one of the diagonals has a length of 6.2 cm. Find the area of the parallelogram. 
Trigonometry
The lengths of the diagonals of a parallelogram are 20 inches and 30 inches. The diagonals intersect at an angle of 35 degrees. Find the lengths of the parallelograms sides to the nearest hundredth. 
Trigonometry
The lengths of the diagonals of a parallelogram are 20 inches and 30 inches. The diagonals intersect at an an angle 35 degrees. Find the lengths of the parallelogram's sides lengths to the nearest hundredth.